This is until the next update gets releaded,
1- do a full backup of your 7.221, i'd suggest via windows explorer rather than from Home
2- Apply the update to 7.48 using home
3-Once the update is done, in windows explorer copy the file named MapSettings.cfg wich is located in /tomtom drive/mapname folder to your desktop.
4-get the mapsettings.cfg that is in the mapname folder in your BACKUP folder and copy it into the device mapname folder.
That's what worked for me
Did it again just to make sure I didn't miss something, but still non functional.
I have all the menu icons working just no response from the upper right meter indicator when i speak showing it hears my voice....