file disappeared completely... SOLVED +++

EDIT: I restarted my computer again to see if it'd help and I saw a .tmp file in the place of the file I had lost. I made a copy of the .tmp file (because I knew that you can recover files with .tmp files) and renamed it to Penguindrum.sai and it magically worked again. Just putting this info out here in case this happens to anyone else.

When I was saving a SAI file, it wasn't responding anymore and so I closed it and restarted my computer................ When I reopened SAI, I tried opening the file but it disappeared.

I've tried searching everywhere (whole computer) and see no trace of it........................................................

So, anyone have an idea of how I can get the file back?