I don't suppose there were release notes to inform users of these changes but you would at least think that they might inform support staff.
May I suggest an email to, at least premium users, just before a new version is unleashed on the unsuspecting.
In this case a headline in the email or release notes like "If you use Office Automation (VBA or Macros in Office Applications), please note the following..."
I can see why you might want to block VBA from opening a file but...
I'm not entirely sure that there is a business case for blocking a VBA script from simply opening a folder. Maybe they need to get a bit more granular on what they block. Preferably before they implement a new technique.
Just think about how much time it takes each user to work out what's happened then multiply that by the number of users affected.
Otherwise, I'm pretty happy with MalwareBytes and recommend it to my clients.