I tried to install it both from Pro19 and from Intuit.  I've run the .NET fixes.  So far no go.  I DO finally at least have a ProWin20 folder, so one attempt got that far.  I've tried at least 6 or 7 times this month alone to download.  Still keep getting that Entitlement Client error 1603.  Still working on trying to get it all downloaded, installed and working....