Hi Stu. Congrats on the upgrade, best thing I ever did.
In ref to the scenery error's I'd post that same question on the ORBX - Full Terrain (or whatever its called) forums as I'm sure they will help you. It might be a scenery.cfg error. Have you checked it? It is a common error that I have had in the past. I am flying the Superbug-tacpak and all is perfect.
I have tool-tips turned off in the (FSX) settings. That should get rid of that issue.