Ahem, it seems the disassembly window only appears when I click Next instruction, which is probably the way it should be, maybe. If I click Next line everything is as it should be. Don't know why I started using next instruction all of a sudden. So problems solved or there never really was one for me. I was just goofy.
Other than that, I'm using Code::Blocks with mingw GCC and GDB quite successfully. Never heard of or used Insight. I'm not an experienced programmer (which you can probably tell by now).