How can we use this to sell themes?

Hello.

1) How can we use this to sell our themes? How can we insert “Buy Now” attached to our download code?

2) How can we edit the description of each theme?

3) If we have 200 themes, how can we split the showcase across several loadable pages?

4) “Thumbnails” are in fact full-size screenshots, is there a way to get smaller thumbnails?

Thank you.

https://www.ads-software.com/extend/plugins/wordpress-theme-showcase-plugin/