Transferring windows 8 app from one pc to another?

This is a rather unusual thing I am trying to do here. There is a game my daughter loves to play and its no longer offered in the windows 8 store, I have no idea why but they took it down. I sold my last tablet to a friend, the game is still installed and still works fine on that particular tablet. I granted myself ownership of the winapps folder and copied the game from the old tablet to the new tablet, I also copied all the game data from the local user account. When I try to run it it says "This application can only run in the context of an AppContainer."

How can I make this work? As a computer tech I would also like to know how to do this in case a weird similar situation comes up for a client as I always get these odd ball requests from my clients. I can just see this happening in the future to me on the job.

Can I build a container for this app that is already compiled? Can I copy the app package info from somewhere on the tablet that its still working on?