Hi! i had the same trouble. With Windows 10 system it seems that OS save the files twice: first in the Control Panel and second in a Local Host (i was becoming crazy to discover it
are my first steps on PC´s world). So, finnally, the solution for me was:
1º After 4 days trying to delete all files, subfiles,temp files,.....I downloaded a free program to uninstall it, here you are the web (but you must download the 30 days for free with the PRO version to take this option, don´t worry you NO need to register/pay/credit card, just try, with this option you can go directly to my solution):
https://crystalidea.com/?source=uninsta ... =dlg_about (Uninstall Tool 3.5.9)
2º Click on "Run Key" , this action will show you the Local Host of your PC, and there....oh surprise! sure you have the Blackmagic folder that you think deleted!
3º the rute to find it there and delete both folders to can reinstall the new version without problems:
Equipo\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run (right click-delete)
Equipo\HKEY_LOCAL_MACHINE\SOFTWARE\Blackmagic Design (right click-delete)
4º Install normally the new version and enjoy
Hope I´ve helped!!