Hello Dudley Nightshade,
Are you getting any exceptions or error messages while decrypting the file using the AxCrypt app? If yes, what type of exception or error message you are getting? Please share the details of that exception or error message. We are investigating the problem and solve the problem as soon as possible.
Do you have any screenshots? If yes, Please you can send a screenshot showing where the problem is, it often helps us understand.
Please write to Support@axcrypt.net. we are happy to help you.