How to configure what happens when users want to activate their paid access after reinstalling or using the extension among multiple browsers?

[luizen]

In the extpay FAQ section, there is this question:

What happens if a paid user uninstalls and reinstalls an extension? Can paid users have an extension on multiple browsers?
Developers can configure what happens for users wanting to activate their paid access after reinstalling or using the extension among multiple browsers. If reactivations are authorized, users can enter the email address they used to pay and will get a login link sent to their inbox. When they click the link in their email, the extension's paid access is reactivated.

However, I couldn't find anywhere how to configure this. Anyone?

Basically I want to avoid receiving emails from paid users saying that they ran out of number of installations.

Thanks