I have the above files for this voice (all 3 off ) it says in fast activate that all is good yet I can not find it scrolling thru the voices
DeviceName=TomTom ONE
DeviceVersionHW=ONE (v8)
DeviceSerialNumber=PBxxxxxxxxxx
BootLoaderVersion=55019
ApplicationVersionVersionNumber=9061
ApplicationVersion=576030.2

Browse to the voices folder on your device and delete (yes, really delete) any *.DCT files that relate to the Grouchy Grandma voice...then disconnect & see if it works

You are absolutely correct. Worked like a charm. Many thanks

My pleasure...remember the next time you use FastActivate to activate a map or something, the *.DCT will reappear so you'll need to do the same thing again