The updates are useless without a key to unlock them.
You should create an account in MyCitroen customer area: [Only registered and activated users can see links. ]
Insert the VIN of your car during account creation and will show the updates available.
In the updates page you can download the license_****.key file that unlock the updates, along with maps and software suitable for your car
The TAR files are compressed archive, you need to decompress with 7-zip to a USB key 8GB formatted FAT32.
In the root folder you shoud create a folder with name "license" where put the license_*.key generated from MyCitroen account.
The folder structure should look like this:
the directory license contains the license file.
The directory SWL contains the software and map updates.