That's great news Choco, but a word of caution. I don't want to dampen your enthusiasm..... but because even though region 41 can't be properly cleared or erased there's always the possibility of it still being accessed by the device's firmware and if so it might read some data (from it's former 37xx 'guises' as 3790 US/EU and 3790 SG/My) that is incompatible with it as a 34xx device. It's unlikely but be aware that it might just die one day and never start again. The greater possibility is that won't happen so you should get many more years use out of it i hope.

About the map update, i've not heard of that rare GarminExpress bug offering anything other that a single "one-off" map update so if it now thinks yours, as a 34xx, has LM entitlement that's an even bigger bonus for you and you've indeed been very lucky.

I'll soon move all these posts from Firmwares section to a 'Solved' thread in Discussion section as it's turned out to have little to do with the actual firmware.