Quirky has been using version 976 from git, for years. This is the "2.2.x" series. Now I have compiled version 2.3.7, released 20170721. This page explains differences between the 2.2 and 2.3 series:
All of my collection of JWM theme PETs will need to be upgraded. So far, have just done the 'brightdeepblue' PET, as used in the latest Quirky and Easy.
The 'jwmconfig2' PET is for the old version. Rather than fix it, I am now using radky's PupControl, which has JWMDesk in it.