I happened to be running Firebird 2.02 on my server, and Firebird 2.1 on my laptop. I did a gbak of the remr.fdb on my laptop and tried to restore it to my server, but the ODS has changed and was not supported by the older 2.02. So, I just uninstalled Firebird, and the ODBC driver, and let the Synapse-server binary download and install the new versions. As a precaution I did do a gbak of the various dbs I had running under 2.02 but there was no problem. The installation was problem free and the new Firebird was able to read the older dbs without having to do a restore.