How would importing into Access would help? If you import encrypted data into Access, it will still be encrypted.
You may be out of luck. Without the password, or key, there may be no way to decrypt. My only suggestion would be to contact the manufacturer of the encryption software (if it's third party) and see if you could persuade them to help. If it's an internal routine, you may be able to backtrack through the code and get an idea.
"How would importing into Access would help? If you import encrypted data into Access, it will still be encrypted. "
May be it won't help, may be it will. Encryption is not dealt with in the dBase documentation I have (up to III plus) but I had a feeling it applied to program files as in those days it was mainly the programme they were trying to protect. Part of the dBase .dbf files are always encrypted anyway, but you can still import the data into Access & others.