You cannot technically "convert" the archive format, but you can create a bootable ISO that contains the environment needed to restore that .adi file.
If your goal is to make your backup bootable, the best way is to create an official AOMEI Recovery Environment and save it as an ISO. Go to Tools > Create Bootable Media . Select Windows PE (recommended for better compatibility). Choose Export ISO File and select a destination. convert aomei adi to iso cracked