This page is just here to host a mirrored download - see the TWiki:TWikiVMDebianStable page on the main TWiki.org site.
These files are now hosted (in the USA) off my site (UK) to save the strain on my cable connection. It should mean downloads are much quicker. There is a 250Gb monthly cap which it's possible you might hit, but so far these files have never generated more than 80Gb/month traffic.
The zip file is the same as hosted on the other mirrors. The .exe file is a self extracting 7-zip archive - much smaller