Can't start versions older than 1.6

On my two Computers don't start Minecraft versions lower than 1.6

---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.
Time: 09.04.17 05:15
Description: Failed to start game
java.lang.NullPointerException
 at java.io.Reader.<init>(Reader.java:78)
 at java.io.InputStreamReader.<init>(InputStreamReader.java:97)
 at bp.a(SourceFile:64)
 at bp.a(SourceFile:100)
 at net.minecraft.client.Minecraft.a(SourceFile:252)
 at avv.a(SourceFile:56)
 at net.minecraft.client.Minecraft.run(SourceFile:507)
 at java.lang.Thread.run(Thread.java:745)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- System Details --
Details:
 Minecraft Version: 1.5.2
 Operating System: Windows 10 (x86) version 10.0
 Java Version: 1.8.0_25, Oracle Corporation
 Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
 Memory: 45721968 bytes (43 MB) / 125042688 bytes (119 MB) up to 1060372480 bytes (1011 MB)
 JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
 AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
 Suspicious classes: No suspicious classes found.
 IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
 LWJGL: 2.9.0
 OpenGL: Intel(R) HD Graphics GL version 4.0.0 - Build 10.18.10.4358, Intel
 Is Modded: Very likely; Jar signature invalidated
 Type: Client (map_client.txt)
 Texture Pack: Default
 Profiler Position: N/A (disabled)
 Vec3 Pool Size: ~~ERROR~~ NullPointerException: null