Isn't this a setting for the OS and the energy options? This would apply to the whole computer, I would think.
There are options Ctrl-O > Messages where you can set what MP3tag should report.
OS Messages, esp. those about failing file access cannot be suppressed.
If you get OS messages that files could not be renamed because a file with such a name already exists - see e.g. this discussion
and also follow the linked threads.