Level editor crashed, and the recently opened map becomes empty.

[Rector]

Hello. I am doing a TC project, and while editing a map, the level editor froze, and it went an hour without it turning back to normal operation.
I saw no other option than to force shut-down it via Task Manager, which apparently was a stupid (but maybe the only) decision.

Then, the results were displayed with the map (previously 1 MB) went to a complete 0 kb size. I can open it in the level editor, but it's empty, nothing there at all.

I do have a cache memory, though I don't know how to (or if I can, but I believe it's possible) restore the map via the cache.

Please, I would love some help quickly. I will also backup all maps further on, so this does not happen again.

Cheers!
Rector