Well, I got it installed - DCS World Beta and the A-10C Beta.
Everything went fine and it did put the sim and user files into new folders so my v184.108.40.206 should still be working.
I got my Warthog assignments all done (the Reference section above has a lot of notes about axis curves and button assignments).
--- issues ---
The Radio Menu mouse doesn't work. I could not find a solution, but others in DCS Forums are talking about it.
The snap views for the cockpit where you press RCntrl-Num0 and then Num1, Num2 and Num3 don't work the way they used to - I can't get a snap view Num1 to the lower left console for the radios and commo control panel - instead it is a closer view of the Left MFCD, Num2 won't get me to the lower right panel for lighting and ILS and Tacan, and Num3 does not give me a close up of the CDU (maybe I have the Num2 and Num3 mixed, never-the-less they don't work). Also reported in DCS Forums.
PeterP put up some extensive notes on screen issues and multi-monitors in the DCS Forums - PeterP's - A Plea For View Export
I have also read where aircraft repairs are not available, yet. At all.