Your v9 maps would have had the POIs added in, hence lost whilst being upgraded. I know newer firmware/maps (can't remember which) allow you to add as personal POI via memory card. Might depend on your version of the RNS.
Ah that would make sense then. It's frustrating as I never asked them to update my maps
I found a .db3 file off gpsunderground and it has instructions to add from memory card, but I've just come back from outside because I'm getting the message 'SD Card Error'. I have absolutely no idea why I'm getting this error, this is the same memory card I've used in the unit for the past year, and I literally just copied the .db3 file to it 5 minutes a go, so the card itself is working fine.
Why is nothing straight forward