Ok, that app gives users the ability to filter the feed by hiding stuff. It does say " With this advanced version of feed filter it is possible for the admin to add own filters for third party app" so I assume there is an add button somewhere.
I purchased Scheinwelt-Media Feed Bypass after speaking to him since that gives the admin the ability to hide it for everyone. Anyways, in that app, there is a screen that lists the last 50 feed items. It also lets you allow certain groups to see or not see feed posts.
Anyways, after I liked a page I went back to the Mange Types and for liking pages it says add:
