ontap

I have 2017 and 2021 shields , I have both gen1 and gen2 Flirc's and I use flirc with various random remotes . Obviously the shield remote doesn't have a mute a dedicated button ( you have to press two buttons simultaneously )and consequently neither do iether of the shield options in the Controller section of Flirc set up. Is there any work around to map a button for mute for the shield ?

Sorry for posting such basic questions. I am having issues setting up the "back" key to use on a windows PC . Using the controller set to kodi or full keyboard, when i click on the back key on flirc app then any key on remote , I cannot get it to accept me the key on the universal remote I am setting up. Key just continues to flash green. Also I have a button on the remote that if i press on it to try and set it as a key , it says "button already exists" , I can't remember which key i originally set for this button and when I select "Redo" then try again it still says "button already exists". ?