the unistaller seems to be broken it it starts up but just seems to crash with no errors…not sure what the issue is…gonna have to do it by hand I suppose… so what do I do…apart from the obvious of course
Delete the application folder 
Settings for beta are stored in a new folder so they cant get mixed up. If you want to delete them anyway, ther are in:
Windows: C:\Users<username>\AppData\Roaming.jmonkeyplatform
Windows (alt): C:Users.jmonkeyplatform
MacOSX: /Users//Library/Application Support/jmonkeyplatform
Ubuntu: /home//.jmonkeyplatform
thanks man