CHS expects the ignore list to be just the filename with its extension, so AutoHotkey.exe looks right.
One thing that I wonder based on a similar post recently, is whether CHS might not be being smart enough about ignoring the data put on by a previous app once another becomes active. It *SHOULD* be smart enough for this but this report and the previous one are making me think I need to go back and check.
You'll note at the bottom of your secreenshot that CHS is reporting the last app IT saw, so if you can activate/switch to your MultiTool and then immediately to CHS and look at that field, maybe it will give us a clue?