unfortunately third-party ‘Like 2 Discount’ and ‘WPsite Background Takeover’ plugins are not officially supported by our theme. If you want to use these plugins, please contact plugin developers for assistance.
You can check list of compatible plugins here: http://themeforest.net/item/royal-multipurpose-wordpress-theme/8611976?WT.oss_phrase=&WT.oss_rank=3&WT.z_author=8theme&WT.ac=search_list
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.