Hey Guys, I'm a noob here and I need help.

I obviously have a TomTom One (v8) and I can't find anything about that version here:
TTGO.BIF:
DeviceName=TomTom ONE
DeviceVersionHW=ONE (v8)
BootLoaderVersion=55136
ApplicationVersionVersionNumber=8083
ApplicationVersion=9669
CurrentMap=de_at_ch
CurrentMapVersion=840.2561
TTGO.BAK:
Not Found...
TTGO.ORI:
Not Found...
TTNAVIGATOR.BIF:
Not Found...

I'd like to have new maps and a new navcore (if possible) but all my searches bring nothing for that navcore-vesrion I have in connection with tomtom one. Also in comaprison charts I don't find any "v8" for tomtom one.
Maybe anybody could help me and show me where to look for the right navcore and maps versions I can use.
Thanks in advance and: I really tried to search first :)