This update is huge:
* the session mode is the main mode, person mode work too,
* delivered in a .dll form now making the plugin reference in your scenes stale (not a big problem actually if you use the session mode),
* the plugin internal id changed CheesyFX.HeelAdjust2 -> Nickon.HeelAdjust3
making all existing scenes to lost HeelAdjust settings (a migration tool provided, python needed),
* version number jump 6 -> 27 to match the internal versioning since CheesyFX development,
* other minor: ImportScenePackagePresets fix, CLS height adjust mode improved.
So if you do not care much about your existing scenes setting (sound settings, height adjust, delta correction) you can update and try it right now. Otherwise I advise to think little more and update

More information please read in the overview page (I will rebuild it part-to-part). That was very hard to me to implement all that unfamiliar things so I expect much bugs. Please report them in discussion thread.