WHS Firebird Database Engine Upgrade
From version 126.96.36.199, ProMaster 5 requires the Firebird database server (previously it was optional). You may already be running the Firebird server, in which case you do not need to install this update. Versions of ProMaster 5 full setup have for some time installed the Firebird server instead of the Interbase server.
In PM5 version 188.8.131.52 onwards, if you try to export a system (to client or to PM5) then it will fail if you are running Interbase as your database server, and this is your queue to download this update and install it on your ProMaster 5 server.