Yes, it is possible. When you deploy an Enterprise application it requires a plist that contains metadata about the application. This metadata includes the version number that you can use to check for updates.
Just distribute the update the same way you distribute the original. The user retains the data from the earlier version.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.