I think the only version working in Linux is the "old GUI" RAPID.
The best version was based on Glade GTK-1. I have not tested it in years.
I tried it on my newest Linux machine and it does not work. It said libpng is missing.
I just tested the "old GUI" version of RAPID dated 2002. I discovered
the arrow keys did not work. I fixed that version Jan 2014 and I call it version 5.40.
I added two graphs to get you started, instead of no data to try.
Glade-3 program builder changed in 2005 and so it is not easy for me to fix that version of RAPID.
So you are probably stuck with a working, but somewhat old looking , RAPID called "old GUI".
Download that one if the glade one fails. Old GUI works. I added some new display resolutions, too.
I can't imagine anybody wants the MSDOS/MSwindows version. It probably works.
All three files are available for download on this page. Try all three before giving up.
This will install the Linux versions:
cd;tar xvzpf rapid.tar.gz
cd;tar xvzpf rapid602.tar.gz
and then run Rapid from a xterm with this, or point an icon at it or put it in your menu.