According to ThemeForest, you have two licensing options. The Regular License, and the Extended License. All these licensing terms are purely handled by Envato (the company who owns ThemeForest), and we have no control over these aspects. To learn more about what each License is for and which one to purchase, please check this link.
If I need to use any of TieLabs themes on a second site, do I need a second license?
Yes. One purchase of any of TieLabs themes allows you to use the theme on one finished site. If you need to use it on a second site, it requires you to make a second license purchase.
Can I use your themes on a test site, then move it to a live site when finished?
Yes, you can. You can keep the theme on a test site to build it, then move it to the live site once you’re finished.
Can I keep a test site and a live site with one Regular License purchase?
According to the licensing rules set by Envato, this is not allowed. If it is installed in two places permanently, then it requires two licenses.