I have VP18,19, and 20 installed. No problems going back and forth, copying projects from 20 to 19 or 18. I'm still on Win10 Pro. So far, VP20 has been running really smooth on my computer. Not one crash so far.
@Dexcon I'm not able to describe the problem.. widnows first acting weird like not opening any program including vegas, and have to end task many times from task manager then restart pc a couple of times.. then vegas 19 started crashing and not responding many times, cant import media, it stops working when importing, i downloaded vegas 20 today and tried also same problem happened, when doing color correction on timeline cant watch the videos they turn to black, play bak is not smooth like before.. everything acting weird.. i dont know if its vegas problem or windows problem.. it just started to happen 2 days ago,, my pc is a powerhorse nothing of this should happen.. still cant know what is the main problem which is causing these things