Click on the link It will bring up a box with a file name int it and asking if you want to save it or open it, Save it When you have done that go to location and Unzip it to a folder on your HDD
Get an SD card with 32 GIGABYTE CAPACITY Make sure its formatted in FAT 32
Copy the folder you unzipped it to onto the SD card
Put it in the DISCOVER PRO and tell it to update.
If you have a MAC that you are trying to do it on Chuck it in the bin and use a PC
Simples