Have you happened to find any fix for this yet? I had this happen last year and solved it by doing a Windows reinstall, but don't recommend it. It's now happened again after a small Windows update. I've tried all the recommended fixes (then and now) and they never work. It seems to me that something is corrupting in the OS or at least causing some sort of incompatibility that the RPH team still can't find a true fix for... However, the nuclear option of reinstalling Windows is always there.