Thanks Patrol and Moonlighter for the info on both threads.
I will try downloading the file from a different PC as suggested and let you know how it goes.
I did save my waypoints before I attempted the update but I'm still concerned about doing a hard reset and losing everything. How can I be sure that my data is saved on the SD card? What format should the file be in and roughly what size?? I have lots of marks that I don't want to lose!
Also, what is the process of doing a hard reset and will I need to update software (other than the legacy patch) after doing one?
Thanks again for your help. As everything is working as it should at the moment, I'm considering not doing anything and waiting for doomsday in April to strike. I guess if its not broken don't fix it?!
Joffo