I FINALLY found a program that I like to make star trail stack shots. It's called StarStax and it is completely free and offered for both PC and mac.

I took these 13 shots up at Mammoth Mountain back in March or something. I had intended to use it as a test of my intervalometer and star streak stacking programs. Unfortunately, it took until now to find a program that I liked. As a test, the shot basically sucks XD But it does serve as a way to prove that I understand the process. I do this for any new technique I learn.