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.

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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.