The latest version of VoxCommando is an attachment to a forum post.
The voice commands for XBox are an attachment to a forum post.
Attachments on the forum are only visible and downloadable after you have signed in, signed up and are approved. (which is delayed).
It's a lot of work for someone that just wants to try out the program. The first time I heard about it working with XBMC, I downloaded the program, it didn't work very well, I quit. It wasn't till I saw a youtube video of it working that I looked into it more and realized you need more files than the download link has. I think you are putting of your user base by not providing all of your files.
Solution : Put the files on the website, all versions, updates, etc. For forum posts, link to hotfile.com (or a free file upload service that anyone can use, public dropbox link, etc) or let forum attachments be visible to all.