8.562 SE Navcore for 32Mb ONE models
To upgrade to this navcore, first do a complete backup in Windows Explorer (not TomTom Home). Then upzip the download and copy paste all of the files directly to your TomTom drive or SD card, overwriting any common files.
If that fails, do a clean install:
TUTORIAL: Clean Install - How to install the latest map and navcore from scratch!
You can use the 8.562 SE navcore instead of the official one to use the above 4009 map. Just skip the steps where you update the navcore and instead copy paste the whole navcore to your TomTom, then continue with the rest of the tutorial.