When I go into the actual download section, it shows two possible scrips to download.  The one i purchased is still unavailable with a 404, the other one requires me to repurchase again.  It wont let me put a screenshot, but this is the general look of it when i click the interactive tab.
Script by Realcumber  -     Single Axis -     Heatmap is not available  - [download button] (404)
Script by Realcumber  -     Single Axis  -    [heatmap] The actual heatmap -  Buy $4.99