Changing the gate code

[paulthegman]

Hi,
I have recently moved into my new old home, loving the already fitted Easygates controlled by nice.
I was given 4x remotes for the system and all work good, but the property was let out for a while to an unknow amount of people before I purchased it.
I can see how easy it is to clone a new remote from a current one and wondered what was involved in actually changing the main signal as if the gates were new and remove the chance of someone out there being able to open my gates.
Also the remotes have two buttons, the top one opens and closes, the bottom one seems to do nothing?
My remote is the dark grey one with white buttons,
Nice ON2 2-channel Remote control transmitter

Thanks

Paul