1) I think I am going to keep the popup menu. I already have a few apps that add to the context menu and until I find a way to make a sub-menu (cascading menu) on the context menu this helps keep the context menu less cluttered.

2) Since I am using external apps (Unrar and 7zip) I cannot "see" inside the archive unless I extract it first. If I do that it would make the app a lot slower just trying to look for a folder or EXE/msi inside.

It could. Sometimes apps auto-assign themselves to a file type every time they are run. That could be what is happening here. I'll try to look into it more when I get a chance.

I'll look into adding these features. It may take a little while though.  ;)