Avast started to forbid NOTEPAD.EXE to save files

Hi!

I was editing a .TXT file located on my Deskrtop folder, and when I clicked “Save” avast started to display a message telling me the app Notepad.exe is trying to alter a file located on a protected folder.

1st - This message didn’t show up before;
2nd - My Desktop folder was never protected.

Why did that message start to show up? How can I fix/circumvent that? It’s annoying…

Thanks!