I was going to play Minecraft with my friend and pressed "Play" and noticed that I was logged in with wrong account (I have 3 accounts). so I pressed "Log Out" before the game started. it went to the log in form and when I logged in with the right account and pressed "Play" I noticed the Play button was disabled. The reason was propably that the Launcher thought that my game was running. So when I pressed log out The Launcher stopped the Game Launching Process without enabling the "Play" button.
Development Console Log
[19:10:03 INFO]: Minecraft Launcher 1.3.8 (through bootstrap 5) started on windows...
[19:10:03 INFO]: Refreshing local version list...
[19:10:03 INFO]: Current time is Jan 11, 2014 7:10:03 PM
[19:10:03 INFO]: System.getProperty('os.name') == 'Windows 8'
[19:10:03 INFO]: System.getProperty('os.version') == '6.2'
[19:10:03 INFO]: System.getProperty('os.arch') == 'x86'
[19:10:03 INFO]: System.getProperty('java.version') == '1.7.0_45'
[19:10:03 INFO]: System.getProperty('java.vendor') == 'Oracle Corporation'
[19:10:03 INFO]: System.getProperty('sun.arch.data.model') == '32'
[19:10:03 INFO]: Refreshing remote version list...
[19:10:04 INFO]: Refresh complete.
[19:10:04 INFO]: Loaded 3 profile(s); selected 'Nusia Survival'
[19:10:04 INFO]: Refreshing auth...
[19:10:04 INFO]: Logging in with access token
[19:10:08 INFO]: Logging in with access token
[19:10:14 INFO]: Getting syncinfo for selected version
[19:10:14 INFO]: Queueing library & version downloads
[19:10:14 INFO]: Download job 'Version & Libraries' started (16 threads, 27 files)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-external-platform\4.5\twitch-external-platform-4.5-natives-windows-32.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.1\lwjgl-platform-2.9.1-natives-windows.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch\5.12\twitch-5.12.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.2\authlib-1.2.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar for job 'Version & Libraries'... (try 0)
[19:10:14 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries'... (try 0)
[19:10:15 INFO]: Download job 'Resources' skipped as there are no files to download
[19:10:15 INFO]: Job 'Resources' finished successfully (took 0:00:00.000)
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-external-platform\4.5\twitch-external-platform-4.5-natives-windows-32.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.2\authlib-1.2.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.1\lwjgl-platform-2.9.1-natives-windows.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-platform\5.12\twitch-platform-5.12-natives-windows-32.jar for job 'Version & Libraries'... (try 0)
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.1\lwjgl-2.9.1.jar for job 'Version & Libraries'... (try 0)
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch\5.12\twitch-5.12.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar for job 'Version & Libraries'... (try 0)
[19:10:15 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar for job 'Version & Libraries'... (try 0)
[19:10:15 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries'... (try 0)
[19:10:15 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries'... (try 0)
[19:10:15 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.1\lwjgl_util-2.9.1.jar for job 'Version & Libraries'... (try 0)
[19:10:15 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries'... (try 0)
[19:10:15 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar for job 'Version & Libraries'... (try 0)
[19:10:15 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar for job 'Version & Libraries'... (try 0)
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Attempting to download C:\Users\Dennis\AppData\Roaming\.minecraft\versions\14w02c\14w02c.jar for job 'Version & Libraries'... (try 0)
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-platform\5.12\twitch-platform-5.12-natives-windows-32.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.1\lwjgl_util-2.9.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.1\lwjgl-2.9.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar for job 'Version & Libraries': Local file matches local checksum, using that
[19:10:15 INFO]: Finished downloading C:\Users\Dennis\AppData\Roaming\.minecraft\versions\14w02c\14w02c.jar for job 'Version & Libraries': Used own copy as it matched etag
[19:10:15 INFO]: Job 'Version & Libraries' finished successfully (took 0:00:00.985)
[19:10:15 INFO]: Launching game
[19:10:15 INFO]: Looking for old natives & assets to clean up...
[19:10:15 INFO]: Unpacking natives to C:\Users\Dennis\AppData\Roaming\.minecraft\versions\14w02c\14w02c-natives-1209863767224033
[19:10:15 INFO]: Launching in D:\Dropbox\Dropbox\mineraft
[19:10:15 INFO]: Half command: D:\Programs\Java\jre7\bin\javaw.exe -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -Djava.library.path=C:\Users\Dennis\AppData\Roaming\.minecraft\versions\14w02c\14w02c-natives-1209863767224033 -cp C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.2\authlib-1.2.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.1\lwjgl-2.9.1.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.1\lwjgl_util-2.9.1.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch\5.12\twitch-5.12.jar;C:\Users\Dennis\AppData\Roaming\.minecraft\versions\14w02c\14w02c.jar net.minecraft.client.main.Main
[19:10:15 FATAL]: Fatal error launching game. Report this to http://mojang.atlassian.net please!
java.lang.NullPointerException
at net.minecraft.launcher.GameLauncher.getMinecraftArguments(GameLauncher.java:373) ~[launcher.jar:?]
at net.minecraft.launcher.GameLauncher.launchGame(GameLauncher.java:274) ~[launcher.jar:?]
at net.minecraft.launcher.GameLauncher.onDownloadJobFinished(GameLauncher.java:619) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:120) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:12) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:89) [launcher.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.7.0_45]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.7.0_45]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.7.0_45]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.7.0_45]
at java.lang.Thread.run(Unknown Source) [?:1.7.0_45]
[19:10:18 INFO]: Logging in with access token
Please attach the complete output of the "Development console" which can be found on the second tab of the launcher.
If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".