I've just gone through the steps to the very end on my upgrade lounge and klarna is still the option for existing upgrade programme so I'd expect it to still be settled. I was confused as the first tfew pages talk about flex, but when you get to the end the 24 month klarna upgrade option is still there.
I didn't bother though, it's 15 quid a month more than I pay for my fold 4, the only difference being it folds flat. No thanks!
Last year after a week, I got an email with a 15% discount code which really brought the price down. Dont even get a free case this year, just 50% off.