Hi @cyntiaverolita,
Based on your question, we believe you are aiming to get our Professional certification which requires KRE. The easiest way for you to get a free KRE license is to actually engage on our forum and take advantage of our Kudos Rewards Scheme.
Once you have gotten enough Kudos, you could exchange them for gifts from us, which also include 3-6 months of Katalon Platform usage.
We hope this helps 