The toolbar icon can be customized from the Panic Button options page. To go there, right-click on the toolbar icon and select Manage Extension (or, open Add-ons Manager and click Panic Button in the list of installed extensions). Then click the icon with the three dots to the right and select Options in the menu.

If you need more help, post to the AE Creations Help and Support forums: https://groups.google.com/g/aecreations-help