Preorder, Back In Stock ‑ STOQ

I was loooking for a pre-order app for my store and downloaded the Stoq app to see how it was.
It was super easy to set up, but i did have a problem getting the Pre-Order button to show.
There is a button for support and within 1 minute Shashi was in contact. He went onto my store and fixed the problem (and redesigned the look) within 5 minutes. It is amazing to have such quick support and i am only on the free plan at the moment, but look forward to upgrading when the store becomes busier.
Thanks