Hello Archie French,
AxCrypt is a file encryption software with no backdoor. That means, Nobody can decrypt the encrypted files without the file password used in the file encryption. This is the way AxCrypt app was designed.
So please try to remember the file password(which was used in the encryption process) to decrypt/open the old encrypted files.
Please use AxBruteForce tool to recover the encrypted files.
We have simple software allowing you to try to find password, and you can download the most recent version from https://account.axcrypt.net/Download/AxBruteForce.exe and read of how to use it at https://www.axcrypt.net/axcrypt-brute-force/ . Please note that we cannot provide support beyond this.
Please note: AxCrypt will allow the users to decrypt the encrypted file with the original password which is used for encryption.
If you are facing any Query/issues, Please write to Support@axcrypt.net. we are happy to help you.