Today I tried opening my file and the only thing that happened was this message of unexpected file format. I tried changing the .skb to .skp and nothing worked.
Can someone help? Or at least, can someone try to recover SOMETHING from my project?
Your file opens just fine, if a little slowly, in SketchUp 2024. It does identify and delete a bad group, though. It’s time for you to update to SketchUp 2024 or at least the last release of SketchUp 2023. If you did that you would also be able to open your file.
FWIW, I did my usual clean up on your model. Fixed incorrect tag usage.
Purged unused stuff. No need to be hoarding all this stuff.
Resized some excessively large texture images.
That cut the size of the file down by more than half.