File crash

I have a big problem. Yesterday, I was working in a file, doing some testes with grasshopper for a facade analysis. Each facade variant was saved in a specific layer. Today, when I opened the file, everything was thrown into one layers, materials and colors modified completely as well.
If i press space while on the desktop (to see preview) the file is shown to be as it has to be, but when i open it I get damaged file. I’ve tried to get to previous versions but it says that there is no previous version available for that file.

Any ideas??

How the file preview is shown and should be

How it is shown once the file is opened

Hi -

I’m afraid not, no.
Do you have a specific workflow that we can use to try and reproduce the issue?