I have skimmed the thread, but if somebody has already answered this question and I've missed it, then I apologize.
I recently updated Calibre for the first time in several months and I see that much of the functionality of the old KoboTouchExtended driver is now built-in. That's awesome; a huge thank-you to those responsible for doing that work!
Is it still possible for me to recover my configuration settings for the old plugin, so that I may set them correspondingly using the new mechanisms and configuration?

(I am quite comfortable on the commandline; if an easy solution is not possible, I might still be up for a more involved one.)
Thank you in advance for taking the time to help.