Don't click the link. I have reported this to the moderators and admins. It is definitely not legal. And although this guys previous posts have been fine advertising is not allowed.
You may want to review the rules:
http://www.shipsim.com/ShipSimForum/index.php/topic,26.0.html
Questionable Content
Since we can't have a rule to cover everything, this is the rule to, well, cover everything. These are public boards, so act like you would if you were in a public place. Questionable content will be marked and dealt with by moderators.
Piracy, ROMs, and Warez
Shipsim.com has a very strict policy against piracy, ROMs, warez, and the illegal use of copyrighted material. Linking or giving information about any site that distributes illegal software, ROMs, media, or emulators, seeking help to circumvent any copyright laws, admitting to possessing and/or distributing illegal copyrighted material, or encouraging software or media piracy is grounds for an immediate ban. This goes for all copyrighted material, especially for ship simulator.
(I have not looked at this site) but most sites like these WILL installer a virus or malicious software in their installers. NEVER DOWNLOAD CONTENT FROM AN UNKNOWN SOURCE.