Existing SketchUp files won’t open

When I try and open my saved SketchUp files the file appears to open but then shows a welcome page and I have to open my existing file from SketchUp. SketchUp has been working fine until last week, I use SketchUp almost every day. this is a new situation?

SketchUp 2022 hasn’t changed since last year. I wonder what has changed on your computer.