When we update the extension we share the latest options available for Premium. The payment page should only appear once every two weeks. We are also working on an option in a future version of ABP to allow you to prevent our update page from opening. If you are seeing the page more frequent than that or want to have this addressed sooner, please submit a support request and we'll be happy to assist you: https://help.adblockplus.org/hc/en-us/requests/new.