[robertus]

If i selected all episode and press save or save all, doesn't save nothing

Clicking the "Save all" button should work. Tested it locally and it works with my test setup. NFOs are updated.
What operating system are you on? Where are the files stored (on your PC's disk, on a NAS, ...)? :-)

Windows 10 PRO.

File stored locally and i have tried also to mount my google drive, same story.
You must select every episode one by one, then save, and save nfo for episode.
If i select all episode and save all, do nothing.
If needed i can make a video