Is it possible to create one app with several exe-files?
In some cases a program exists of more exe-files which function each separately, however together they form one program. For example I bring on the free music creator software PxTone: https://en.wikipedia.org/wiki/PxTone
It's a package containing 4 small exe-files, because next to a sequencer there's separate software for creating instrument voices and SFX and there's a player. (By the way: it's all portable by itself, however I don't know it leaves traces into the Windows Registry)