

No, you can not just find it and throw at Firebird 2.5 - different FB versions have different incompatible formats of it. When you removed that wrong Firebird installation (you DID uninstall it, didn't you? 'cause having several FB instances on one computer is possible but requires special arrangements and you did not report you did them) - the "security database" of it was orphaned.There is high chance, but no warrant, that during installation SteamSoft found that wrong Firebird version and created the required users/logins into that wrong Firebird instance's "security database".

Either 2.0.x or 2.1.x or maybe even 3.0.x - but the one SteamSoft could not work with.
#Firebird central password#
But usually there is only one instance of Firebird on a computer, if at all, so in most cases you may think there is one "security database" keeping Firebird users and password on a computer. There can be several Firebird 1.x or 2.x instances running on a computer, each would have it's own "security database".

It is may be more complex/flexible with Firebird 3 or 4, but that is not your case. Firebird has all the users/passwords saved in so-called "security database" that is one per installed Firebird instance.
