Either I don't know how to use it, or it does not work.
I select the file with tags filled, click "copy all", select the file which has no tags - now the text fields are filled with text. However when I click "Apply" the tag editor closes and tags are not recorded.
Only for the first file on which I tried to use it I somehow managed to copy the tags - I was trying many combinations (I was trying to figure it out), but I do not remember what I did.
Dženan