you don't have to struggle with jar stuff.
here is the windows execuable "mylizzie.exe," you may install just like any 64 bit windows program and ready to run.

https://www.goandai.com/download-mylizzie/

its core is lizzie.
BTW, let me know if you have any problem w.r.t. download, install (actually just unzip, or unrar,) and settings. i would be able to offer my experience.

I use mylizzie to beat KGS's petgo repeatly, which is an 8 dan, and i was ranked 8 dan,
using mylizze to face your opponent, you may easily recognize your opponent an AI go or a real human: by setting game as 1 minutes, 20 seconds x 3 ; or 1 minutes, 15 seconds x 3.
human instinct vs. AI instinct within 15 seconds, human will loss.
moreover, setting a game by 1 minute, 15 seconds x 1.