I'm kinda confused by your question, the whole "locked" folder thing, but how I would uninstall it is either delete the entire directory (of the game that is) or navigate to the folder:
Code:
$ cd Transgaming_Drive/Day\ Of\ Defeat
and simply run the uninstaller with winex
Code:
$ winex3 UNWISE.EXE
Although I have a feeling just rm -fr the game directory would be much easier.