won't update previous version to pro

I have two questions:
I wanted to purchase the Popup Pro plug-in, just this plug in. However, it seems that I have to sign up for a monthly subscription, which I'm not interested in, but I did anyways. Since I've already been charged, once i unsubscribe will i be able to keep the pop up pro plugin?

Second question :
My plug-in which i downloaded before I downloaded the Pro version won't allow me to use the pro features, even though I've downloaded the dashboard and the pro version as well.