Please try to activate theme now.
Note that you may use the 1 license for the 1 dev domain and 1 live domain. But keep in mind that you can use our theme license for 1 end product only https://themeforest.net/licenses/standard
I’ve checked your old site and see that theme deactivated http://prntscr.com/hvjpbs so now you are able to activate theme on new site, go to Theme Options and enter your purchase code. If you face any problem with this, please provide me screenshot.