I have always had issues with the cad side of bobcad, it's I bizarre interface and feels weird. I use rhino and love it. That said the cam side of rhino is expensive so I use bob just for cam. It's ok but for what I paid, then the upgrade it only feels average. Machining 4th axis, I haven't done any yet, isn't really 4th axis ie draw flat and it rolls up.
It's annoying when you pay for software that includes bugs that are not fixed before issue. I believe they should upgrade you to the latest version as a sign of good faith and recognition that you have paid for and are relying on software that is really still under development