hmm I just tried to get it in here but it says it is empty (it also shows as 0kb). Pretty odd
I usually opened it from ‘recent files’, but today I cleared my browser/cookies and stuff so that dissappeared. I am sure on the last time I edited it it sayed ‘saved’.
Your first post said the file was on your drive. If it is, it should still be there regardless of cookie clearance. You could try doing a search for SKP files in File Explorer.
So your primary goal is to resume working on the file that is in Web? In regular Web version, at least, you can find your files that are not in Home / recents by going to Open> Trimble Connect, or Trimble Connect tab > SketchUp, or going to the main menu within an open model and selecting Open.