Minecraft new launcher doesn't open the 1.5.2 when you try to download and open it.
It gives this error:
---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----
---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----
---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----
---- (We'll do this automatically later ;D) ----
Client> HELLO FROM WRAPPER
Client> Exception in thread "main" joptsimple.UnrecognizedOptionException: '2' is not a recognized option
Client> at joptsimple.OptionException.unrecognizedOption(OptionException.java:89)
Client> at joptsimple.OptionParser.validateOptionCharacters(OptionParser.java:538)
Client> at joptsimple.OptionParser.handleShortOptionCluster(OptionParser.java:463)
Client> at joptsimple.OptionParser.handleShortOptionToken(OptionParser.java:458)
Client> at joptsimple.OptionParserState$2.handleArgument(OptionParserState.java:56)
Client> at joptsimple.OptionParser.parse(OptionParser.java:385)
Client> at net.minecraft.launchwrapper.Launch.launch(Launch.java:31)
Client> at net.minecraft.launchwrapper.Launch.main(Launch.java:17)
Game ended with bad state (exit code 1)