There is a bug regrading Chains which we unfortunately found just after releasing 2.2.0. It is fixed for the upcoming 2.2.1 release.
Reverting to 2.1.3 should fix the problem - see this related thread: https://forum.audacityteam.org/t/short-cuts-for-chains/47323/2
BTW you can have more than one Audacity version on your PC at a time provided you install them in separate folders but you can only run one at a time though.
This is the bug report: http://bugzilla.audacityteam.org/show_bug.cgi?id=1770 Crash applying certain chain files
WC