You have to have the software to program the remote.

If you don't know how to use the software, it doesn't matter if you want to change 1 button or a whole house system. It's going to be Greek to you.
"I just need to change one O ring on the space shuttle, it's easy right?" - April 4, 1983.

Ask the programmer how much it will be. It will only take a few minutes to do what you are asking. If he can drop by while going to/from another job (and you are a regular customer), they may not even charge you. I wouldn't.
If however you live out of the way and have never bought anything from them except that remote..., a service call around here can run $100-$150 depending.