I'm going to stick with smartACARS3. I loaded up NEXUS but don't really feel like learning a whole new setup. When I started up NEXUS it did automatically upgraded to version 15. When I got it set up I could not figure out how to get a flight working. Guess I'll have to read more of the instructions. I did not attempt to create a NEXUS account. The section I tried to upgrade from was located at the bottom of the NEXUS official site page not the NEXUS ACARS page and labeled "upgrades" but I was obviously in the wrong area .
When I completely removed the version 15 NEXUS from my HD and reinstalled it again after a hard reboot I was surprised that it did not automatically upgrade to the newer version 16 or if I'm reading it correctly version 20. At that point I removed NEXUS and reinstalled smartACARS3 with no problems. Apparently failing eyesight and a messed up back make simple things complicated.