It's a very, very complicated American legal web involving SFB there Bonk...
To try to detail it in the condensed version... :roll:
In 1973, Franz Joseph was "commissioned" to build Star-Trek related technical materials (the Trek Tech Manual / Deck plans). As Mr. Joseph copywrighted these works in his name before presenting them to Gene Roddenberry, issues resulted, whether or not Mr. Joseph planned to essentially sign all rights over to Roddenberry / Viacom (Paramount).
Hence, while the manuals etc. were printed, the Trek Powers-that-be denied anything contained therein.
SVC approached Mr. Joseph, after the Animated series was over and Trek's future was uncertain, for rights to build a game based on the materials in his books. Mr. Joseph granted those rights.
Hence SFB was born.
When the movies were coming out and Trek was reviving, Paramount (at the time Viacom's owner) proceeded to chase down SVC because of his "unlicensed use" of Trek materials (Connie, D7, Warbird hulls, racial names, etc.). The ruling was, since SVC had a license to use the materials from Franz Joseph, Paramount couldn't shut him down. So, SVC and Paramount made a separate "compromize" license arraingement, which allowed SVC to legally trace his materials back to the Trek source (hence the blurb "may contain some elements from the Star Trek TV show" on his products), and sent a small royalty back to Paramount. Paramount also "protected" their standing in this process, preventing SVC from taking anything else from Star Trek that wasn't ennumerated in the Tech manuals etc., and specifically locking down "SFB-related" computer software.
So, ADB still owns all SFB material not drawn from the Franz Joseph & Paramount licenses. That is why both ADB and Paramount's permissions were sought (required) for SFC, all the rules (HET, 90% of the hulls, extra races, etc.) are allowed in this game by ADB's license, and the "Trek" name, the movie-era Fed/Klink/Rommie ships, etc. were granted by Paramount.
Thusly, in theory, ADB could use the SFB ruleset, and 100% ADB-created materials (such as Omega Quadrant, ISC, Hydrans, Lyrans, Neo-Tholians under a different name, Seltorians, etc.) in a non-Trek-Related / referencing computer game. In the meantime, I'm fairly certain that the first time someome released a mod that turned this game into "SFB" as we know it, with "Trek Related" components, someone's getting sued. As that someone "might" be SVC, as it could be cited that he "circumvented" the agreement / restrictions in making that game, we understand his reluctance to market anything tying SFB and computers together without all the appropriate agreements (a-la SFC) made.