Fascinating... with all your cleverness, education and skill level, how keen you are to condemn Access and cast the first stone...
With 20+ years experience in SW development, I can tell you it's always these "< 1h" jobs that turn out to be a huge headache. It may be a 1 hour job if you know exactly what to do. But what if not. What if there are problems. And even if you get it done within an hour, there's still the whole build process, testing, packaging, publishing. And all of a sudden you face weeks of unplanned work load.
If the fix is actually to switch off signature checks, then this could (and should) have been announced by the manufacturer. But maybe that's just the surface...