Login Items list incomplete

Wishing to prevent this on next startup I went to System Preferences/Users and Groups/Login Items to remove it. It was not however listed. In fact only four items were listed and only three of these ticked - TomTom and ColorMunki (a screen calibration programme) and iTunesHelper.
I expected to find a longer list than this and I certainly expected the Mediafire Express application to be listed.
Can anyone explain why it may not be listed and why it stratus if it is not listed? How can an unlisted application be removed from the start up process? Other, of course, from doing what I did which was to Trash the application.
Running 10.7.5.