I am having a hard time wrapping my head around the import functions, mainly with assemblies.

When I import an assembly, it looks fine for the most part, but I can't do anything with it, and it looks like it doesn't import the components as separate entities, or at least not the same as if I import them on an individual piece.

With sheet metal parts, it looks like I can't flatten the old parts anymore, or am I missing something?

It also looks like some of the assembly imported parts import both the folded and flat patterns.