Your encrypted files are encrypted with the old version(1.x). Now you can decrypt/open the encrypted file in AxCrypt latest version with the original file password(which was used in the file encryption process). without file password nobody to decrypt/open the encrypted file.
AxCrypt 1.x and 2.x are compatible in the sense that 2.x can open all files secured with 1.x. In addition to that, 2.x implements of lot of new rich features, while some functions of 1.x are deprecated. Files secured with AxCrypt 2.x are not possible to open with AxCrypt 1.x. You cannot have both AxCrypt 1.x and 2.x installed at the same time.
AxCrypt 2 asks you to sign in to your account, which AxCrypt 1 did not. We now use a single sign on model where the same password is used to sign in to our servers and to protect your files. The password that you’re being asked for is the password to your account, which you probably created when you first installed AxCrypt 1.
If you open files encrypted with a different password than your sign in password, which often is the case directly after upgrading to version 2, you will be prompted for that original password. If the file was encrypted with version 1, it will then be automatically upgraded to version 2 and to use the new sign in password which means you won’t be prompted again for the old password.
Please check out our video tutorials at https://www.youtube.com/channel/UCoSoXBjq6iCG5232fHoWStA and our other documentation at https://www.axcrypt.net/information/get-started/ to get started with AxCrypt.