Well, I think we could walk through some examples so you could get a main idea behind it. The customization details depend on your rig configuration. Is your front-back system still going to be stereo, i.e. consisting of 2 separate channels?
I'd recommend you to consider at least a little padding underneath.
The SimShaker Sound Module doesn't try to recognize the buttkicker. It just pushes audio into the sound card of your choice (or default one, if none was selected).
I think the previous versions archive is handy for the case like yours. If one installed a fresh version and it didn't work and could rollback to the previous version easily.
What's the problem with the "13th Nov" version?
The update system had been changed. Now one is just informed that there is a new version and prompted to download it.
You can get actual version at simshaker.com website if not prompted.
I don't think that's possible. But you can get back to the demo mode by temporarily renaming "\Documents\SimShaker for Aviators\Soundmodule.cfg" and re-check.