The app was updated, and they are much harder to find.
First you open GSE /gse
Then you click on any of the first 3 buttons or the 5th.They will take you to the same place with a different item highlighted
Then you Click on the tiny plus after Keybindings seen in First.png
then you click on the tiny plus after Keybindings seen in Second.png
Then you click on New Keybind to create a new Keybind. As far as I can tell, you no longer can quickly edit an already created keybind, since the info does not show up in the left panel for some reason.