When double clicking on a sketchup file to open, it opens ‘untitled’ and blank. I then have to go File>open to open anything i’ve been working on in sketchup.
I have sketchup as my default app and even trying ‘open with’ it still will open it ‘untitled’ and blank!
Make sure no other instance of SketchUp is running. (Perhaps restart your computer)
Find your downloaded installer file - (or download a fresh copy from here: Product Download Confirmation | SketchUp ) - right click on that installer file and chose Run as administrator.
When prompted chose Repair. Let the repair finishes.