I rarely use plugins aside from KK, Kontakt, Play, and the hosted synths, but in many different combinations, it always crashes on closing. So it's hard for me to see how it could be anything other than a VE Pro stability issue. BTW VE Pro 5 never had this issue for me (but I did not get it until it was stable). I really like the ability to disable channels, and I need VE Pro to do any kind of decent size session, but I expected it to be more stable than this by now. Oh yes, and constantly checking for updates on VE Pro, KK, Kontakt, etc. to hopefully make it all a little more stable is getting tiresome. But I am getting better at getting stuff done and saved while it's working.