Nulling and/or activating is not a thing to learn it, at least not from the start. It requires some aptitudes, a good php/javascript knowledge (some scripts are both ways protected) and sometime a keen eye for weird things. Reduced to basic all the scripts have the same function method:
if ($licensed) {
allow_the_script_to_run();
} else {
throw_error();
}
If you master PHP then trust me when I say that you won't need to learn how to null. It'll come naturally.
Note: Forgot to mention beside PHP is important to know how API works. Most of the scripts (more than 90%) are using curl to retrieve their data from dev server. Identify that and assume what data is retrieved then do the according changes.
let me know.
