PurgeIE comes in two versions: PurgeIE and PurgeIE Pro and according to the official website, you can install the application on the following versions of Windows: Windows XP, VISTA, Windows 7 and Windows 8 with maximum supported version of Internet Explorer being Internet Explorer 10.
On the other hand, the software has been discontinued because Microsoft released Edge, a completely new browser.
Quote from official website:
"This is due to Microsoft's announced intention to replace Internet Explorer with a new web browser named Edge (or Spartan). This is expected to occur with the official release of Windows 10." - PurgeIE website