I think most of the info is in the question but here's a little more detail on what I'm trying to achieve.
I control VLC via my Android phone and the VLC Remote app. It works just fine, but I'd prefer to run a different service on port 8080. I'm running VLC on Windows 7 64-bit.
To be clear, I have VLC running on my PC, displaying the content on the PC, but the control is handled by the smartphone.
I have enabled HTTP interface through "Preferences -> All -> Interface -> Main Interfaces -> HTTP remote control interface"
I have checked inside "%APPDATA%\vlc\vlc-qt-interface.ini" and couldn't find anything relevant. I also checked "%APPDATA%\vlc\vlcrc" however there are a lot of settings in there I don't yet understand.