To all people currently listening to music via Controller

[bluegaspode]

I have attempted to install the headphone switcher in 7.4 and got as far as selecting 'install' within the applet installer on the controller (on the 'advanced' menu). However, I can't then find the headphone switcher in any of the menus after that. Am I doing something wrong?

The radio-button where you select 'install' is just a selection.
Go one menu up, there will be an install-button (saying '1/x selected'), when you press it it will say 'Downloading' and your controller will restart.

On the new Firmware the 'Extras' menu isn't showing by default, so you might have to go under 'Settings->Home Menu' to make it visible. I'll update my installation manual to reflect the changes.