Script edits on codeigniter

There is a codeigniter script that was made for sale. Each client who bought the script was entered on my site in his personal account (his email was indicated), this email person who bought the script indicated in his config. And in this way, the script allegedly checked the license by Email. That is, if the email in my personal account and in the clients config coincided, then the script was set all right. Like, this is a check for a license :) Now I would like to remove this and give the script to everyone for free, so that there are no such checks. Plus, the script has a built-in update over the air, if I changed the version of the script in my config, then automatically offered an update to all those who installed the script.
As a result, I want to give the script for free without binding a license and remove the update over the air, so that the update simply happens manually, the person himself replaces the files on his hosting. The script is written in codeigniter.

Write, please, the price and terms for which you are ready to perform this work.