Locker file disappeared

I have a WD My Passport external drive. I am using FOLDER LOCK7 to encrypt important files. I was working on the locker file when my system restarted after a blue screen. After that the locker file disappeared. It was in the name of PROGRAM FILES.flka. Instead, a .flkb file appeared along with a portable exe file. I have tried using the password with the exe file but it is not accepting it. I have run the Easeus software to recover the file but could not get that PROGRAM FILES.flka file back.

Please guide