Steinberg has released a new Yamaha/Steinberg driver version 1.8.3 for Windows and version 1.8.1 for Mac.
The free update fixes some minor issues and ensures compatibility with Windows 8.1.
Please find the updates here:
UR22
CI1
http://www.steinberg.net/en/support/downloads_hardware/downloads_ci1.html
Best regards,
Stefan Schreiber