How to make custom menus compatible with controller input?

[Hero Complex]

So occasionally my friend group decides to play the starving floor mod. We quite enjoy it, but I use a controller and the custom menu to choose a class doesn't work with a controller (it just moves the character around in the background), and if I started the game with a controller connected or connect it before choosing a class, the menu isn't selectable, even with a mouse. The only solution we have (other than me not using a controller) is to restart the game and use a mouse until my class is chosen. My hope is that there's some sort of code I can add to the files somewhere to either make it selectable with a controller or make it so the mouse still can select a class if the controller is connected. The mod can be found here: http://steamcommunity.com/sharedfiles/filedetails/?id=474285910&searchtext=starving+floor

Edited April 24, 2017 by robert5