First off make sure your logitech profiler is running as administrator.

the screenshots below are from v7.00.291 ( this is the same software that is is now used for the G110 & G13)
open the logitech profiler, i tend to stick with the default profile.

right click on the key you require to change and click edit (or assisgn keystroke on the version you are running)



clear the key files and select the key assignments you require.