Hello,
1) You have already asked about this redirect. We told you that we don’t have option for this in our theme. Contact vendor plugin with this request.
2) Enable page builder for the static blocks https://xstore.helpscoutdocs.com/article/47-static-blocks and edit the mega menu static block to change content or add additional categories.
3) Go to Theme Options > Header builder > Account > Content Type > choose None.
Regards