Win10 and the problems with CA2A/Rapture Pro & Sessions.

Has anyone been able to pinpoint the fault?

There are updates or rollbacks for both. Check the stickees 

Thanks "dlion" I have gone both (forward & back) most current and the "Early Release" versions, I'm happy to say that I've fixed my problem with Sonar! There's always a resolution if you know where to look, I just notice that "Other" Sonar Members are still having problems.
 
Thanks!