Kaspersky AntiVirus 13 download results in file with different MD5 hashes

I just downloaded a handful of copies of Kaspersky Antivirus 13 via the HTTP link below and keep getting a file with the same name, but a different MD5 hash. Can someone else try downloading the file and checking the hash value for a couple of files to see if this is something Kaspersky is doing? Are they changing the MD5 hash of the file dynamically for each download?

The file name I downloaded is: kav2013_13.0.1.4190abcdefgEN_4519.exe

I was downloading the file from here (expand Kaspersky Anti-Virus under "Personal and Family Security" at the bottom and get the English/USA Canada version): http://usa.kaspersky.com/downloads/product-updates

Does this happen for others?

The MD5 Hash app I'm using: WinMD5Free v1.20 on Win 7