Hi Josh,
While Anthology XII does not include any of the older MK I versions, the group license will still activate these versions, so your old sessions will work without issue. You can still download the Anthology X installer here to get access to the MK I versions of the plug-ins used in your older sessions. During the installation, just be sure to uncheck everything but the specific MK I versions you need to install.
Please be aware that we stopped supporting Anthology X before Avid made Apple Silicon AAX available, so if you’re using Pro Tools you will need run your older sessions in Rosetta.
