Hello,
Please follow next steps:
1- Theme options > General > Enable Old Widgets Panel > On
2 – Dashboard > Appearance > Widgets > After the products > delete static block from this area
3 – To be able to edit the content of the static block, enable WPBakery for static blocks – https://www.8theme.com/documentation/xstore/plugins/wpbakery-page-builder/ , then go to Static blocks and edit them
Regards