If you click the 3 bars for settings and then choose my games and apps their are 2 columns of apps , installed and all. If you click all it should show installed and all the apps you have ever used even if you have un-installed them. It acted like a sort of history page so if you forget the name of something you had un-installed you just looked at the list as a memory jogger.
For some reason all the apps i had used have gone from this list does anyone know why. I dont know if an update has caused this to happen.