Remove a broken item from startup?

When I upgraded to Maverick, it said my TrendMicro was no longer compatible and to upgrade. However, it was expired so I ignored the message. I recently renewed my subscription and downloaded a new version. BUT when I went to install it, I received a error message saying it could not install with the previous version still installed. I moved the application to the Trash to install it and deleted the trash (thinking this would unistal). Unfortunately, now the icon is still stuck up in my startup.

I have tried going in through preferences>user>login items and it will not let me unselect it! I have even tried deleting the files using the /library/launchagents and deleting the login files. However, once I restart my computer they are STILL there and so is the icon at the top!!!!!! I even tried starting my computer up in safemode with no success.

What do I need to do???? It will NOT GO AWAY! and I need it to so I can install my new antivirus!

Thanks for the help!