This may sound like a stupid question but I patched 2.2 to 2.3 and after I deleted the correct folders 2.3 worked fine for me. I was blessed that I don't have a whole lot of add-ons (FS Global 2010 Terrain Mesh, FTX Global, FTX Vector, NC Mega Scenery, and a few aircraft). Do I need to uninstall/reinstall all these add-ons now that I've updated to 2.3?