Hi,
I had the same problem with another product.
With Windows Search (Win+S) open WBEMTEST (Run as Administrator).
Connect to namespace "root\SecurityCenter2"
Open class "AntiVirusProduct"
Instances (commands on the right)
Select the instance to delete (check the Guid, in your case is guid ending with 3EA23
Delete the instance
Close
Save the object
Exit
Now you won't have the reference anymore.
If you need to do the same on multiple PCs I think you can perform the same steps with wmic.exe, but I don't know the syntax.