Hi, I'm Nathan.Sorry to hear that you're having trouble, but I'll do my best to help you. Please give me a few moments to review your details here.
Did you program the remote yourself initially?
Okay what you'll need to do is plug the remote into your computer with the usb cable, open the logitech software, and then edit the programming by deleting the old receiver and adding the new one.
Do you need a link to install the software again, or do you still have it?