dmpotter, typing the following in cmd should work, for the java version:
java -version
Also, the errors you got were file read/write problems. Can you run it as admin? I write the setting to a small text file (actually a csv saved as .txt) and that seems to be the error.
Honestly I have neglected the CLI version as of late, because I anticipated more people using the GUI version, but I will add more documentation to my Github wiki to help people get started and answer any questions that may arise.
TL;DR: Right click the jar and run as admin to see if the GUI version works.