If you only want to hide some of the widget areas and not the whole sidebar, we need a link to the page in question to be sure of the custom CSS.
And yes, it is time to switch , as all this is a lot easier in Xtreme 🙂
https://guide.weavertheme.com/converting-a-weaver-ii-pro-or-aspen-site-to-weaver-xtreme/