This is an interesting issue, though. Doesn't the "Sins of a Solar Empire Diplomacy.exe" have Entrenchment built in? What would happen if you deleted "Sins of a Solar Empire Entrenchment.exe" from your computer? Could you still play Diplomacy?
Is it that you need to have purchased Entrenchment in order to purchase Diplomacy or does the actual game.exe file itself require that Entrenchment be installed? When you launch "Sins of a Solar Empire Diplomacy.exe" does it also open up "Sins of a Solar Empire.exe" and "Sins of a Solar Empire Entrenchment.exe" in the background? Or does it merely just refer to other files that (textures, etc.) that would have been installed with Sins and Entrenchment? (My guess is that it's the later.)
