Explorers was actually using a IIc, not a IIc+! The main difference is that the "plus" is much faster (4 mhz, I think?) and has a 3.5" floppy. I had a IIc growing up... only 1 mhz, 5.25" floppy.

It has a very similar-looking Apple computer but the movie predates the model in the post.

I had never seen that movie before, thanks for the random comment. I watched it tonight and it was the perfect 80s tech/space movie.