Exact Audio Copy (
https://www.exactaudiocopy.de/)
is a good Windows program for ripping CDs to WAV or FLAC files
(never use MP3 format for Pianosoft Plus Audio tracks, as lossy
codecs like MP3 will corrupt the particular modulation scheme Yamaha
chose to use).
I am not aware of any software to convert Pianosoft Plus Audio
tracks to Enspire-style Pianosoft Audio full tuples (i.e. MIDI file
of the piano part plus WAV/MP3 file of the accompaniment for each
track), though it is technically possible to do such a conversion;
it's basically the inverse of what MID2PianoCD does.
However, Yamaha itself was working on a project a few years ago to
convert all of their Pianosoft Plus Audio content to Pianosoft Audio
(using the original source material when possible), so you might
inquire whether an exchange program is available or whether they
could provide the equivalent Pianosoft Audio files if you prove
ownership of the corresponding CD.
Mark Fontana