Hello,
In the latest versions of Advanced Installer, the
updater.exe will automatically be signed with your certificate.
This can be seen in the
"Digital Signature" page -->
"Files configured for signing" tab.

- Screenshot_52.png (21.85 KiB) Viewed 7258 times
In older versions, if you'd like to sign the updater, you can manually add it there and it will be signed. It is not recommended to sign the one from the folder as you did.
Best regards,
Catalin