Thread: TT one new edition upgrade

I want to upgrade/update my one new edition but the more I read the more confused I am getting, as I see it to be able to use the maps I want I need in excess of 2 Gb storage so I need a SDHC card, to use this I believe I have to update the boot loader.
First problem: in the bootloader page it says if you have a BL of 1.xxxx don't upgrade then a couple of lines beneath that it says use 5.5242, so which is it, do I copy the 5.5242 to the card of leave well alone,
Next problem: which Navcore and Maps do I need for Europe? there seems to be quite a few with different numbers.

Is there a detailed step by step set of instructions for doing the upgrade that a lesser competent geriatric mortal like me could follow?
all help gratefully received.

TTGO.bif attached.