David,
Thank you for pointing me in the right direction.
By now you will probably have read that I successfully renamed the 2.8.2.2264 entry in the C:\Program Files\TomTom HOME 2\xul\application.ini file to 2.8.3.2499, allowing my full use of the HOME software, including updates for Safety Cameras, QuickGPSfix Data and MapShares.
Thank you, Alex, if you are reading this.