I get this errors on startup:
[16:28:26 INFO]: Minecraft Launcher 1.6.11 (through bootstrap 100) started on windows...
[16:28:26 INFO]: Current time is Feb 8, 2015 4:28:26 PM
[16:28:26 INFO]: System.getProperty('os.name') == 'Windows 7'
[16:28:26 INFO]: System.getProperty('os.version') == '6.1'
[16:28:26 INFO]: System.getProperty('os.arch') == 'amd64'
[16:28:26 INFO]: System.getProperty('java.version') == '1.8.0_25'
[16:28:26 INFO]: System.getProperty('java.vendor') == 'Oracle Corporation'
[16:28:26 INFO]: System.getProperty('sun.arch.data.model') == '64'
[16:28:26 INFO]: proxy == DIRECT
[16:28:26 INFO]: JFX is already initialized
[16:28:26 INFO]: Refreshing local version list...
[16:28:27 INFO]: Refreshing remote version list...
[16:28:29 INFO]: Refresh complete.
[16:28:29 ERROR]: Unexpected exception refreshing profile list
java.lang.StackOverflowError
at java.util.HashMap.hash(HashMap.java:338) ~[?:1.8.0_25]
at java.util.HashMap.put(HashMap.java:611) ~[?:1.8.0_25]
at java.util.HashSet.add(HashSet.java:219) ~[?:1.8.0_25]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:248) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:252) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.CompleteMinecraftVersion.resolve(CompleteMinecraftVersion.java:240) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:169) ~[launcher.jar:1.6.11]
at net.minecraft.launcher.updater.MinecraftVersionManager.getVersionSyncInfo(MinecraftVersionManager.java:155) ~[launcher.jar:1.6.11]
...
Uninstall then reinstall the game. Seems like your profiles got corrupted.