How to profile a standalone (or packaged) game?

I am using the Unreal Frontend started from the Editor to run the profiler. This works well for PIE games. However, that way also the Editor’s updates and rendering (e.g. slate) becomes part of the profiling data.

So I want to profile just the game itself. Thus I started the standalone version of the Frontend and launched a game from the session manager. That itself works fine, however, now when I select that session and want to preview data in the profiler, nothing happes. It looks as if no data can be collected from the launched game.

What do I need to do in order to profile a launched or packaged game, so that I don’t see all the overhead from the UE Editor itself?