Rated 4 out of 5 stars

Working great in 78.9.0 but where do I find the preferences tab to choose custom shortcuts? I'm lost.

This review is for a previous version of the add-on (1.7). 

You need the "Manage Extension Shortcuts" tab.
It can be found via menu: Tools, Add-ons and Themes, click on the wheel up right and you'll find: Manage Extension Shortcuts.

Sorry for my very late reply, hope you found it in the mean time.