2021 Photoshop Elements

Got a message that there was an update for Adobe Premier Elements 2021 to 2021.1.  Tried to download it. Stopped before finishing with a message that upgrade had failed due to locked file.  Now when I try to open Photoshop Elements, I only get white screen.  When I try to open Adobe Premier Element, I get message saying that the short cut has changed.  What do I need to do?