I'm looking for a copy of the version.xml file from ~/Library/Application Support/Apple/AirPort/Firmware/ from someone that updated to all the older versions on their AE 6th gen. I want to try to downgrade firmware, but I only have the url for 7.7.3 (latest) in my file. According to Apple's documentation, this should have links for the older versions if you installed them. Update: I found links for 7.7.2 and 7.7.1, just need older in case one of these doesn't fix it. My actual problem is that the CISCO vpn client in Windows randomly drops. This only started after I replaced my AE 5th gen with the newer version. I even tried a 2nd one and the same thing happens. If I go back to the 5th gen, then it works fine. I read others had the same problem and were able to downgrade firmware to fix it.