Won’t Let Me Edit, Right Out Of The Box

Downloaded this for the first time ever. As soon as I open an existing database, it drops a sheet telling me to UPGRADE NOW! When I tell it “no” (because I downloaded the free version to evaluate it and compare it with Base, which I’ve been using for a few years), every menu / button that lets me edit the schema is disabled. Further, I have no idea what the “Untitled” tab it opens is for, or really, what any of the tabs are for. The whole thing seems confusing, buggy, ill-conceived, and for that reason I don’t trust it as a dev tool.

xayes about Datum Free