Suppose you have three domains pointing to the same website: domain1.com, domain2.com and domain3.com. If domain2.com and domain3.com will be redirected to domain1.com, then you only need to purchase a license for domain1.com. Otherwise you have to purchase multiple licenses for each domain (suppose the acquired licenses are lic1, lic2 and lic3 respectively). Then you can open the accordionmenu.js file with Notepad, and insert the following script(in green color) between the var amenuOptions={...} and the var amenu =... :
Note: Above domain2.com and domain3.com must be in lower case.