In order to get my MX Master Mouse and MX Keys working together using the unifying dongle (bad latency issues when using bluetooth), I have had to download Logitech SetPoint, as neither Bolt nor Options (or the beta Options) could resolve the issue I was having where the unifying receiver was not being recognised properly or drivers installing under Windows 10. SetPoint resolved the issue quickly and was flexible enough to allow me to change which 'device slot' on both the mouse and the keyboard represented the Unifying connection as opposed to existing bluetooth connections. - it seems a shame this functionality is not in either of your 'advanced' software packages. It is also a shame that there are no articles under your support resources that could resolve my issue.