Star Traders International is the third version. It contains a community translation to six languages done by volunteers. We didn't feel right selling donated work.
Star Traders Mini is a super stripped down low resolution version that is 1/7 the size of RPG. Tiny downloads are appreciated by some users, but can't be combined with full size editions.
Having actually played these games (particularly Cyber Knights which is an absolutely brilliant CyberPunk/ShadowRun tribute), I support these developers. I was highly skeptical when I first played the Star Traders game because the website wasn't the greatest, but after having played the games, I went and downloaded all their other stuff as well. I can see how it would be easy to dismiss them, but the algorithm is just wrong in this case.
Star Traders Mini is a super stripped down low resolution version that is 1/7 the size of RPG. Tiny downloads are appreciated by some users, but can't be combined with full size editions.
The other two are basic freemium Paid/Free.