1. There is no option to change the size, only via additional customization in the source code (it is out of our support scope). Rewrite
et_search_get_posts function (legenda/framework/theme-functions.php file) in functions.php of child theme and change this – http://prntscr.com/jjgg6z
2. By default, there is no such possibility.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.