Have you built the system on your own? Why some files are still encrypted even after buying the license?
The complete system has been developed by Yo!Kart/FATbit team with copyrights of design and code of the system.
The reason for partial encryption is to avoid the unauthorized installation of our products on multiple domains and only our framework files are encrypted. You can still make the changes and add APIs as per your requirements.
Please refer to the below URL to know about the Yo!Kart technology stack: