Automatic updates

I have bought/donate WinSCP through Windows Store and when I try to put my email to enable automatic updated it says "Your email is not authorized to automatic updates".

How can I verify my email?

Microsoft Store installation updates itself automatically. It does not even have that box for email address. You have probably run your old classic installation by mistake.
See https://winscp.net/eng/docs/microsoft_store#transitioning
Thanks for supporting WinSCP!