I'm a long time FlameRobin user and Firebird lover. After a server upgrade, I found that FlameRobin doesn't run on Windows Server 2016.
Here's the cure: New Firebird admin tool called FireBolt. Replaces FlameRobin. Get your copy here: https://www.jetlyt.ca/ Learn more here: https://www.amazon.ca/dp/B07D42WGH9.