Why did you uninstall the program? If the program can Lock a folder, then it'll also Unlock it. Did you try that, unlocking the folder. I know a lot of utilities that do the same, protecting the folders but they're shareware...infact I use one of the freeware its called Fake Folder. Fake Folder adds the Control Panel registry key as the extension, so if you protect a folder using that program, the next time you try to access the folder Control Panel will open. If you can PM me your email address I'll mail you the program. Its a small 100KB exe.
As far as the current 'problem' is concerned, try this and this should solve it -
Start->Run->command [enter]
Once at the C:\Windows Desktop> prompt type -
cd\ [enter]
cd mydocu~1 [enter]
You'll get the C:\My Documents> prompt. Now this is the important step. You've to type this very carefully.
ren IanAlt+2+5+5 Ian [enter]
In the above command, type ren then Ian, next hold down the Alt key, then press the numbers 2,5,5 in order on the Numpad only. The character for Alt+2+5+5 is the _
So thats how the folder is protected. By just the _ and Alt+2+5+5 procedure.
You can as well protect the folders just by these DOS commands without using any programs.
If you need more help, feel free to ask.