Okay, I think I've found the 7.2.42 VHD release, and I believe your download link needs updating. This is in reference to my original post "When is 18.104.22.168 going to be released for the Free LoadMaster?" If you step through the download process by selecting the HyperV dropdown box, and then select your country like "United States" the zip download you will receive is 7.2.41-1, which of course is 2 patch releases old. The current one as of today is 7.2.42.
However, if you take a look at the path it points to an AWS S3 buck that's not secured(so you don't need to auth with your Kemp credentials). The root directory(https://kemp-artifact-packages.s3.amazonaws.com/) has an xml file that list out each available download, one of which is 22.214.171.124.16189-RELEASE/LoadMaster-VLM-Microsoft-HyperV.zip, which is exactly what I've been asking for. So, simply append that to the URL, and you'll successfully be able to retrieve the current VLM VHD of 7.2.42.