I downloaded today's binaries and the problem persists, so it wasn't just a compilation glitch.
Yes, ufoconsole.log just contains two lines, always the same two lines, but the timestamp at the start of each line is changed on each launch, so it must be clearing the file and rewriting the log on each launch.
The path noted in the log (C:\Users\User\AppData\Roaming\UFOAI/2.5-dev/base/keys.cfg) is correct (mixed slashes aside), but that directory does not contain keys.cfg