Man... I am really tired trying to crack this program. I try using bpx readfile and bpx readfilea and somehow find the part that read the keyfile. But I still can't find out what next. Could someone please help me crack this program ?

No disrespect intended, but one of the reasons that you often see suggestions that you do a search "before" you ask for help is that there is often "help" in the form of articles or previous threads available "if you look."

As to your specific question, a review of the Newbie Board over just the last 45 days would have led you to a long thread on 4-25-2001 which contains substantial hints and directions to helpful articles on "reversing" various versions of Win Commander and where the difficulties may be found.

Give that a try and come back after you've tried some of the things you find there.

Good Luck JMI