Documentation has move here
Step 1: Copy file into hooks-directory
Copy the purchased and downloaded script file into the hooks-directory of your website.
hooks/AppGiniHelper.min.js
Step 2: Include script
Open hooks/header-extras.php in your editor and Include the script with the following line of code:
<script src="hooks/AppGiniHelper.min.js"></script>
Tips
Custom pages
If you are creating custom pages (see here), you may be facing the problem that referencing the library works for all pages but custom pages within hooks-directory.
In these cases you should change the reference to this:
<script src="<?=PREPEND_PATH?>hooks/AppGiniHelper.min.js"></script>
Alternatively, you can reference a fully qualified url (address):
<script src="http://localhost/PATH/TO/YOUR/APP/hooks/AppGiniHelper.min.js"></script>
But keep in mind that you will have to change the src-address when copying or moving your application to a different location. If, for example, you upload your app to a server called example.com, you will have to change src to something like this:
<script src="http://www.example.com/myApp/hooks/AppGiniHelper.min.js"></script>