Hello,

1. Seems that these tabs come from some plugin, please disable all plugins that are not related to our theme for detecting which one causes the problem.

3. Sorry, the items images from the Categories menu are changing via the “Image for header menu” field that is in Dashboard -> Products -> Categories.

https://monosnap.com/file/qFDTMfPFST40HKxB2lvDVIu68Pr9BF

Kind Regards