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To avoid any oops, suggest the following:

$ cd $HOME $ ls -d ./.wine $ rm -fr ./.wine

Could be a dumb question - won't this blow away all wine apps? What if there is a need to just uninstall *one* app?

I think the OP wanted to blow away all apps. I was merely suggesting an alternate to "rm -fr ~/.wine"; if you have a space between ~ and /.wine then you have blown away your whole home directory.

For those who fear unwanted spaces sneaking in-between the commands, GUI based file manager is preferred. This is one of the case where I suggest using a GUI tool while working on GNU/Linux platform. Konqueror, Nautilus etc. are good tools to remove selected files and directories from the file system. If Xwindow is not installed on the system, then mc can be used instead. They also allow recovery of deleted files as deletion usually means automagically moving them to your trash folder.

Raghu