Hi!

We have quite a few plugins/apps we've paid for that are due updates. The problem is when we go to update via the marketplace, there's no option to update - we're being asked to purchase the plugin again?! For example...

Try here: https://invisioncommunity.com/clients/purchases/

Indeed if you go to the above URL, its likely you have an outstanding renewal for that item

Oh thanks both! Is there a way to set up auto renewal? 

There is no automatic renewal on the marketplace at present