I have tested your new version and it works very well, the only field I now have to type myself, after the import of the CD, is Year Released.
Your program is especially useful when importing a CD and want the result files coded as Atrac Advanced Lossless, for other lossless (or lossy) codecs there are several (free) rip programs with direct connection to Discogs or MusicBrainz etc.. For example you can rip to WMA lossless and import the files in SonicStage while keeping the tags.
Your instructions how to use the program are very good also.