Trial for V21 PRO removes V20 from start menu Windows 10

So, I decided to try V21 PRO, Windows 10, and as I have done with all upgrades since V8(ish), by using a few test directories. When I went looking for the V20 icon on the start menu and in the 'all apps' dropdown list, the shortcuts were gone. Had to go back into file manager to find the program icon, later realised that the desktop shortcut is intact. Also When I restarted V20, it had forgotten which session I had been using. 

Anyone else find this? Or am I just in the January blues...

G