Firebird itself has no auto-update. If this is a Linux installation,
then maybe the distro automatically updates, but given you mention
Windows Event Logs, I assume that is not the case. Are you by any chance
using tools that automatically update application (there are a number of
security tools or general 'software update' tools in the market that do
this.
That said, applications that work on Firebird 3.0.1 should work fine on
higher versions (though maybe not 3.0.6, as that versions has some
connectivity issues, which is why 3.0.7 was released).
Also, Firebird 3.0.1 is pretty old by now and a lot of bugs have been
fixed since, maybe you should consider updating to 3.0.7.
Mark