Hello, here we go!
I do not know which software version is already on your device, but
the software version FN10.2 is needed strictly for the latest map update.
If you just have FN10.0, then FN10.1 and FN10.2 must be downloaded.
If you have already FN10.1, you just need to download FN10.2
Use the links below:
http://navimanager.falk.de/FN10/sw/Viper/{28BC056A-7B6B-4B6F-94FF-7FE6AB5F4AE8}.zip => FN10.1
http://navimanager.falk.de/FN10/patches/Viper/{6C15F474-217B-4244-94D4-B6DB9BCE5A3F}.zip => FN10.2
Create a new folder on your PC. I suggest, we name this folder => "Update"
In both archives there is a folder that has the name "anywhere".
Unzip the downloaded files und copy the content of the folder "anywhere" to folder "update".
Pay attention to the order!
First FN10.1, then FN10.2 as second.
Allow overwriting!
Do you still have the SD card with the script from the last time?
Copy the folder "update" to this SD-Card and boot your F12 with inserted card.
Use file-explorer of your device and copy the content of "Update" (found on storage card) to "My Flash Disk" (root)
Allow overwriting!
Maps can be updated in the same way. Unzip each Zipfile and copy the content of the folder "anywhere" to folder "update" too!
Please notice, that everything you do is at your own risk!!!