After trying I also found 4.0b version does work now although it wasnt working well before additionally it runs my rtx2070s hash a bit slower than versions 3.5 did
I am experiencing the same problem after updating to 4.1. with the older version I was getting 372MH, nothing changed and now i am down to 280MH. Thats a 30% drop in hash, anyone else seen this and found why (or solution)?