Hey sorry for the late reply, I haven't had time to fiddle with this until now. Thanks for the instructions. I've used this rollback process before for another container and it is simple enough. I was able to pull down the 1.3.15_18_ge050905b2-1-01 bulid. Unfortunately none of my torrents appear in the client after reverting. Looks like I'm just going to have to add them all back in manually.
No worries though, I will just continue to use the latest build with sonarr/radarr on the trackers that are compatible and create a new instance with 1.3.15 so I can keep seeding until the rest of my trackers add support for V2.
The new interface is really flying and I am loving it. Thanks again for your hard work and assistance, binhex. You are the man!