Also take a look at the FAQ
Your export output looks good. File path + File name is important because Mp3tag can use it to match each line of the csv file with the right audio file.
The " and ; could be a problem if you have them in your tags.
The "Tab delimited text" config is probably safer.
And the tag fields must have no line breaks.
To import the data with Mp3tag you first have to delete the header line.
Then open "Convert > Textfile - tag"
Add the text file.
Now the important part the format string.
For semi colon csv and tab delimited text:
"%_folderpath%";"%_filename_ext%";"%Artist%";"%Album%";"%Title%";"%Year%";"%Genre%";"%Comment%";"%Track%";"%Discnumber%";"%AlbumArtist%";"%publisher%";"%ITUNESMEDIATYPE%"
%_folderpath% %_filename_ext% %Artist% %Album% %Title% %Year% %Genre% %Comment% %Track% %Discnumber% %AlbumArtist% %publisher% %ITUNESMEDIATYPE%
No guarantee it's 100% correct, check the Preview first.
Try it first with a copy of your files
If you use the tab delimited text you have to past the whole string from the forum here or from a text editor because you cannot manually enter a tab in the edit field in Mp3tag.
can't you enter a tab by $char(whatever the number for tab)? however doesn't matter tested import and everything came up roses, and checked all my files, only "Wierd Al" Yankovic is going to have to be managed individually because there are quote's in his name.
I'll let you know the result when i finish modifying over 23,000 files 