I bought the WP file download plugin to install it on a client's website. Now, the license has expired and the client wants to update the plugin. They would pay it by themselves from now on, so I won't use my account. But how does the licensing work? We don't want to break the plugin and the website, so reinstalling is not something that we want. Can the client buy their own version, disconnect my JoomUnited account and connect their new account? Will the client be able to update the plugin that way?