The Ultimate Sales Boost app doesn't have an excluding feature. Sorry for the inconvenience.
There is a workaround here.
You can create a campaign
- targeting the products you want to exclude, and
- turn off all the widget in this campaign while keeping it active.
If this campaign is the top priority for the targeted products, no widget will show.
This is a bit tricky, and we understand it could be hard to maintain your campaigns in this way.