My backup file said "this does not appear to be a sketchup model"

SketchUp Pro
1

So I was working with a small file that I stupidly forgot to save. It was a 30 minutes of work and I might just close the window and clicked no for saving.
The I managed to find a file that supposed to be the backup or something. I forgot what was the format (SKB or something?), but I rename it with something I will remember with .skp at the end.

It ended up shows “this does not appear to be a sketchup model” when I open it. I’ll upload the file here
Masuk Mall - Basement-0.skp (3.6 MB)
just in case anybody can recover it. Thanks in advance guys.

2

Does the .skp open minus the work done since the previous save?

3

Some parts of the file seem to have been overwritten. I could not find enough in the file to recover anything.

4

It doesn’t open at all. As far as I remember, I haven’t save anything during the work.

5

Thanks for trying, Colin.
So there’s nothing I can do for now?

6

If Colin couldn’t salvage anything there is indeed nothing you can do except start over.