Latest version of Opt+ broken. Lost my already-paired Bolt KB 955 & 750 mouse. Uninstalling/reinstalling didn't help. Some buttons in the apo don't work. KN 950 insert key doesn't work at all w/out setting it in the dirver (critical - programmer).

Very shoddy software - drivers are critical and must either function or allow roll-back, and Options+ does neither.

Needs to be fixed. Premium product doesn't work after a week. Next step is returning MK 955 combo ($100) and dropping Logitech completely.