I'm afraid, you received ScriptVocalizer as a complementary access with your Promoyze Club subscription. Your ScriptVocalizer access will remain active as long as you keep renewing your Promoyze club subscription.
However, ScriptVocalizer is an independent app. If you wish to cancel your Promoyze Club subscription but interested to keep using ScriptVocalizer, when your Promoyze club is expired you can buy a subscription of ScriptVocalizer from our sales page here: http://scriptvocalizer.com/fe/