How to change GPL version to pro

I download PRo 30 free trial and i already using GPL version So how can i change to pro version in visual studio code .

Hello,
If you’re using the React JS Gantt Chart, then you should have received instructions in a letter after the purchase that describes how to install the pro version from our npm.
If you’re using the JavaScript Gantt Chart, then you should see the article about installing the pro version:
https://docs.dhtmlx.com/gantt/desktop__install_with_bower.html ;
Also, you can check the recent forum discussion on the same topic:
Vertical resize [React]