In reply to Ahmad Awais.

Ahmad,

Using custom admin URLs is a bit of an edge case and would require adding more complexity in the form of a settings page where users could enter domains and their corresponding login paths, then checking against those every time a login or admin switch is taking place. Since I'm trying to keep the extension simple and lightweight, I don't have plans to add that feature at the present.

However, since it's open source, you or anyone else can feel free to fork the original and add any custom settings you like – https://github.com/kellenmace/wp-admin-switcher/

Glad you're finding it useful! ?