http://bugs.winehq.org/show_bug.cgi?id=30441
--- Comment #6 from Anastasius Focht focht@gmx.net 2012-04-15 09:06:00 CDT --- Hello Ilya,
well sorry to hear that you lost all stuff when purging default WINEPREFIX (~/.wine). I suggest you make yourself familiar with the concept of 'wineprefix' (WINEPREFIX environment variable).
See: http://wiki.winehq.org/FAQ#wineprefix
For future: never install all apps/games in the same "default" wineprefix, use a separate prefix for each app to isolate them from each other.
Installing multiple apps in same wineprefix is a recipe for disaster, the prefix will most likely break and can't be repaired.
Regards