>I have tried to delete the foxuser.*, but I don't know how, it don't work.

Are Foxuser.* Poor Files to YOU!?
Why kill them?! They save all you current environment setting!
Such as SET EXACT OFF..... Even Toolbar Position.....
Save .Prg without any .bak for backup....

Don't fool yourself, If you find that the small files can save all your favour
setting on VFP, You will like them... ^_^;

The only thing you need to do is to kill them before make an Installation!
Remember to Kill the DK??*.* for Re-reinstallation it.. ^_^"