Cancel iscanner?

Hello! Are you referring to a subscription?

If so, follow the steps in this article in order to cancel a subscription: If you want to cancel a subscription from Apple - Apple Support

I hope this helps!

What happens when you try to click 'Edit'? Are there any error messages or does it just not respond?

Try restarting your Mac: Shut down or restart your Mac - Apple Support.

Let me know how this goes or with any extra information you think will be helpful!