Try all of your passwords that you’ve used with the file.
AxCrypr 2 has only one password. The first time you go to open an AxCrypt 1 password you’ll be asked for have the old password l. After that the file will be re-encrypted in AxCrypt 2 format.
You’ll get in a terrible mess if you start changing passwords. That’s why AxCrypt 2 uses only one master password.
So to get back into your file try all your passwords (the AxCrypt 1 password, your original AxCrypt 2 password, your changed AxCrypt 2 password and any other password you’ve created).