Hi! My apologies for the trouble this has caused you.
The Prime and Teams licenses have not been changed since releasing it (see old post here). There seems to be a bug in the licensing that was discovered when we deployed more backend checks in December (upon releasing 3.3.4).
The Pricing page shows what features are available for Prime versus Teams. Users will need to upgrade to Teams to continue using Shared Drives/SharePoint via this path: insynchq.com/upgrade.