As an old boy and a long time user of sketch up
I only just updated my skp to 2016 Pro although I kept pro 8 running on the same machine
just in case (on another license)the machine is an all singing super fast running win 10

In the past I got very few BS'S and generally it was when I Knew what I had done

Since the upgrade both versions give me BS several times in a session and its not when I'm doing something extra ordinary but just the simple stuff I tried a repair but that would not happen and I'm generally cheesed off.Having to revert to the saved version and loosing a lot of time

Looks like I'll have to delete and try a reload any Ideas why this should be happening
another older machine with 8 pro still runs with no BS on windows XP .