Hello Dugover,
You can open/decrypt the previously encrypted document(1.x) with the latest version(2.x).
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.
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.
You can download the latest version(2.x) of the AxCrypt app from our official website: https://www.axcrypt.net/download/
Please check out our video tutorials at https://www.youtube.com/channel/UCoSoXBjq6iCG5232fHoWStA and our other documentation at https://www.axcrypt.net/information/guides/get-started/ to get started with AxCrypt.
If you are facing any Query/issues, Please write to Support@axcrypt.net. we are happy to help you.