Uninstalling Python extension Lab ...

Dear Knimers, after I uninstall Python Lab extension (which seams for me that it takes to much times to load a nodes at starting KNIME and I do not feel like I willy need it) and then run KNIME again with -clean startup, and then come back running KNIME in normal startup I notice that this extension is still here! - as you can see on picture below - and, of course, it took so much times to load a node repository again … any explanation or any advice how to make startup time on loading nodes shorter?

Thanks in advance