“Install anyway”, on the first run, was acceptable. That happened for 3.0, 3.0.1. The mystery is that for 3.1.x (I tried all Zip versions), the warning appears EVERY time it is run.
I got nothing much from either Microsoft or StackExchange – just “change your preference”. Now the preference seems to require an Administrator (I don’t think it did before, but I can’t prove it). So I gave up and just changed the preference. :/
