The popup switcher

Click the extension's toolbar icon to open the popup. It shows a list of every bar you have. The bar that's currently loaded is marked; click any other bar to switch to it immediately. A dot appears next to the loaded bar when it has unsaved changes. From the popup footer you can also reach the online help, the source repository, and the Settings page (the gear icon), where all bar management lives.

By default the popup hides bars you've marked as common. Tick Show common bars to list them too - useful when you want to switch directly to a common bar to edit it.