Wedge,
The forums over at
@David's site are still active. It's just the store that is shutting down at this point. I've been working with a handful of people to test the latest version on TriFlight. It's currently being re-based off BetaFlight 4.1. F3 flight controllers are on the way out so stick to F4 or F7. We don't have an officially supported list of Flight controllers at this point, but some of the ones that have been tested are the Matek F405-STD, F405-CTR, F722-STD, F405-mini, Omnibus F4 nano V3, and the Holybro Kakute f4 & F7 FCs.
Cheers!
LitterBug