Clickable tiered rows

Dear support,

I need the tiered rows to be clickable, so that the first amount in that tier is automatically chosen as amount. The premium version of this plugin does that right? Also do you have a demo of the premium version of the plugin?

I also would like to know how the payment of the premium plugin works? If I don’t renew my licence after 1 year, does the plugin goes back to the free version, where I don’t have the option of clickable tiered rows?

Looking forward to your reply.

Thanks!