Hi there @MarianoSantos; welcome to our Community!
If the file has been somehow deleted, you should be able to restore it from your deleted files page or the events page in some cases.
As per the specific version of the file you're looking for, if you can't find it at all on our website, have you tried locating it locally on your computer?
Lastly, since you mentioned that you were working on a desktop, do you remember if our desktop app was running and syncing your changes? Does it show 'up to date' within your menu bar/system tray or is it still syncing?
Any additional information will be much appreciated, Mariano.