Can i modify KNIME IDE source without any license violation?

I need to modify the KNIME IDE for my specific project requirements.I need to modify existing menu and views in the KNIME Analytical paltform.

Can i do it without any KNIME license violation?

IF so , Where can i get the source of the KNIME analytical platform.

 

 

Here is a nice description how to access the source code https://tech.knime.org/forum/knime-developers/showing-source-code-of-existing-knime-nodes (2. post)

Knime is published under GNU General Public License, Version 3, you can get the full license information here: https://www.knime.org/knime-open-source-story

Best. Iris