Advantage Database Application failing after 14.2 Update

I'm having a strange problem after updating our server and clients from 14.1 to 14.2.

Our 2 Windows 10 Pro workstations can no longer access our backoffice software, which uses Advantage Database Server 10.10.  They both worked the day before the Endpoint update.  They both failed since the update.  Now I get Error 7077: The Advantage Data Dictionary cannot be opened.

The Windows 7 Pro and 8 Pro workstations are still functioning normally.  Any ideas?

Stuart