Try this: run registry by typing `regedit' after clicking Start button in Windows and then click Run. Then delete this string value:
HKEY_CURRENT_USER > Software > FolderLock6 > LastLockerPath
Then boot to Safe mode , hold F8 Key when start PC
Go to My Documents and search for a file name locker with extension (*FLK) or (*FLKW) and delete.
Reboot PC in normal mode , run the Folder lock program and click trial, then enter new password/confirm new password,MAKE SURE TO REMEMBER, I use 123456 for easy one
Then go to option, and uninstall the program as you wish
THIS WORK FOR ME