-
itunes uses a database to store ratings, Mp3tag doesn't have such a thing and won't get one.
So if you want to rate songs, you need to store it in the tags.
You can create a column with a field lilke %rating% and put in the number you want. -
Neither [Return] nor [Ctrl+Return] has any effect for me. The key to open the default player is [F4].
If you want to open the explorer via shortcut, you can create a new tool entry as described in the FAQ.