From our logs, we can see that you downloaded AxCrypt, created an account, and set a password. Then, about 3 hours later, you signed again to the web site and among other things changed the password.
This means there are two passwords in play. Please sign out and exit from AxCrypt, then ensure you are online, sign in again with the new password and try again. If the file still does not open, please use the original password you set when you created the account.