Java has a feature known as a comment. You type it with //.
Sadly, your system is a bit too easy to break with a single comment.
Before:
if(!new AdvancedLicense("YourLicense", "
http://your.domain.com/License/verify.php", this).register()) return;
After:
//if(!new AdvancedLicense("YourLicense", "
http://your.domain.com/License/verify.php", this).register()) return;
Maybe look into finding a work around for this ;)