License portability

Hello,

having not received a confirmation email after my opening support ticket on your website, I’m trying this way.
After purchasing your File Manager plugin and filling the License activation form, I discovered you provided no way, apparently, to deactivate the license for the website where the plugin is installed for the first time which, in this case, is a dev environment with a dedicated URL.
Uninstalling and re-installing the plugin did not solve.
As we work usually using local / remote environments, this is a issue.
How am I supposed to use the plugin I just purchased, when moving my work to production website with official client’s URL?

Waiting for your reply.

Patrizio