After doing a bit of research on the issue, it looks like previous versions of Artisteer have issues with exporting Joomla 3 templates. Try downloading the newest version of Artisteer and it should resolve the issue. You may also take a look at the forum thread that I found as well at the following:
Template Basic Options not available for Artisteer Templates in Joomla
If this fails for some reason, I recommend contacting Artisteer as they would have more information regarding the functions within their software.