Thanks. I'm attaching the Cura and Stderr logs which seem to be most relevant. In both logs, the following error is caught:
2018-11-19 08:18:15,653 - CRITICAL - [MainThread] cura.CrashHandler.__init__ [65]: An uncaught error has occurred!
2018-11-19 08:18:15,655 - CRITICAL - [MainThread] cura.CrashHandler.__init__ [68]: TypeError: unable to convert a Python 'str' object to a C++ 'double' instance
Please advise if these aren't the right logfiles. I just tested adding my Ender-3 from the list and that was uneventful.
cura.log
stderr.log