I believe it was version 2.10 that had all the info on how to use the frequency files (.csv). I am a current FastLane subscriber, but I missed that update. Is there somewhere else I can get this info?
Honestly, I can't remember. Hopefully someone has something that old. I bought it 5/1/17 and started with 2.39. I know they're used with FMP/24 but I never bothered getting them to load correctly.
As @BM82557 implies, the 'Notes.txt' file is cumulative so that anyone coming into the Fastlane stream will have access to all of the notes for features introduced prior to the point at which they joined.