Jabra's website killed the old links. And sadly, it seems that even their indexed site links don't point to the correct ones either.
Here's the new Jabra support page for the cruiser.
Instructions on how to reset pairing for the Jabra Cruiser:
The speakerphone registers a list of up to 7 mobile phones.
To remove the list, press and hold the Answer/End button, Volume up button and FM button at the same time. A beep indicates the list was removed from the speakerphone memory. The next time you power on, the speakerphone will go into pairing mode as the first time you powered your new Jabra CRUISER on.
If you need to do a full reset, there is a little hole you need to stick a pin in for 10-15 seconds underneath the unit.