Premium Support Explanation

Hi

I am just a bit confused about how the premium version of the plugin works. On the Envato site, where I bought this plugin, I paid for 12 months of support. Does this mean I cannot use this plugin after that time? And does this mean I cannot receive updates for the plugin after this time period?

Or does this mean I have purchased this plugin and I have access to it permanently?
I am just wondering how this all works as I’m a bit confused. Will I have to buy this plugin again in 12 months?

Thanks a lot.
Kindest regards.