Where can i download earlier version of katalon?

i am using katalon windows 6.3.3 and would like to try the latest 7.0 version.
before i do so, may i know where to get the 6.3.3?
in case my test cases failed at latest version, i can roll back.

You can check it here: https://github.com/katalon-studio/katalon-studio/releases

thanks @sang