A program can be assigned to another category via the “Category” context menu item. Winaero Tweaker provides access to numerous options and settings. The “tweaks” are listed in a tree view.

The website may look questionable, but the app is legit. (Winaero Tweaker) By the by, if these pop-ups irritate you, you can deal with them once and for all with a variety of third-party applications.