If you want your SleekBox to be either included or or excluded from a specific page(s) this can be done under settings in the editor.
Selecting "Show on" will ensure that the SleekBox is only shown on the pages you type here. Selecting "Hide on" will ensure that the SleekBox is hidden only on those pages of your website that you've defined.
Remember, if you want the SleekBox to be included on a specific category + subpages of this category, you need to type in the URL of the category page and once again with a star (*).
When adding a star (*), the SleekBox will only be included on pages with something after the given URL. If you want it to be included on the category page itself, this URL should be included separately.
The same goes for SleekBoxes, you want to hide, by the way.
(see example below)