How can the Niagara systems profiler be cleared?

When profiling Niagara systems using the ‘stat niagarasystems’ console command or from the editor ‘Stat > Niagara > NiagaraSystems’, even in an empty map, the profiler continues to show Niagara systems that are not in the map. In a map with Niagara systems even after the systems are deleted, they continue to show in the profiler. How can this be cleared/reset?

I have added a photo of the empty map with lots of Niagara systems that aren’t even in the map showing in the profiler.

Figured it out. In case anyone runs into this issue, the profiler also shows Niagara systems opened via the content browser (maybe in a separate window or something), as well as those in any open BPs.