Something very weird: fla file does exist, but after working with it, remains like just openend

Hi everybody!

I have a terrible issue, I will try to explain it the best way.

1. I receive a file with the lay out, bg, characters, you already know.

2. I open it and make the actions for the animation of the shot

3. I have autosave enabled, but anyway I am saving every time. I noticed that everytime I do save, the autosave files disapear

4. I finish the shot, publish the swf, save and shut it.

One or tow days later I go to open the file and it is like the first time I open it, even with the same hour I opened for the fist time

It was happened to me 3 times and I am sick of this. Now I am making a rar with every file after saving it and before shuting, but I am terrified about find all my files like if nobody worked on them!! Lot of lost working hours.

I tried to reset preferences and I couldn't. I tried to find any autosave hidden folder and I didn't find any recovery files.

I have the last version of CC 22.0.5 and Windows 10.

Can someone help me?

Thanks in advance.