I'm not sure why farr was insisting on running at startup in your case, but let's see if we can't get you completely clean of it.
First unisntall it from the add/remove programs list (sounds like you already did that).
FARR doesnt change or add any system files, so there are only 2 places that FARR files will be:
1) In it's program files directory: C:\Program Files\FindAndRunRobot\ - you can delete that directory.
2) IF you have vista or windows 7, there will be some configuration files for FARR will also be in a directory of this form: C:\Documents and Settings\YOURUSERNAME\My Documents\DonationCoder\FindAndRunRobot - you can delete that directory as well.
That should do it. If FARR is still starting at boot time then it means you may have run a copy of it from some other place on your disk that you are forgetting about.. a download directory, etc.