When I go to the page to download the newest version, it says Version 6 Build 8. When you click on the download button it says Version 6 Build 8. Nothing about Version 6 Build 9.
What was probably happening to you was that your browser was showing you the update page from the copy it had in it's cache.
I encountered that as well, as possibly did numerous others. For me it was something that I am usually on the look out for - browser caching that is. All I did was forced a reload of the "eCabinet Systems Updates" page and the updated information and links appeared.
(Not sure if Thermwood could add some kind of HTML that would force the page to always be loaded from it's server instead of allowing the browser to cache it.)