You've tried restarting your Windows machine, right? You should try clearing the system settings on your H9 as well by starting it with the right footswitch and the HotKnob switch pressed (the switch in the upper left hand corner of the H9).
Do you have Windows 10 installed? Did it recently apply any updates? We've heard from a fair number of users who've had problems after Windows 10 updated itself. Windows 10 has a fairly good help section on trouble shooting Bluetooth connectivity issues, and most users who had Windows 10 problems were able to solve them after consulting the Windows 10 trouble shooting help.
