Sophos Phish Threat Upgrade Instructions

In MS 365 Admin > Settings > Integrated Apps, there is the ability to Update an add-in with a new xml Manifest file.

If we already have the newer Report to Sophos add-in, but are just updating the latest v1.4, can I just do that method?

Or do I still need to completely remove the Add-In and add again?

The Upgrade instructions listed are not clear on this scenario - just mentions if you have the older version with the old logo and title...

Upgrading the Outlook add-in - Sophos Central Admin