Changes of File Rating doesn't work for me

Hi, I need to change the file rating in Device Lis / Endpoint / FIle list but after applying the change from the drop down menu, the raiting of the selected file remail the same. Thanks

Also I’m not able to “Rate as Trusted” an application in the “Antivirus / Current Malware List” (the choice is greyed out, probably because the “File Hash” column is empty.)