SOB... finally got the passphrase I used and sync is working on my new PC....
I was almost 99% I have tried it before, but 100% not, since now it works
I went systematic over all the possibilities and finally "find" right "word".
I remember using opera starting back in 2003, I think they added this feature right around then and it was amazing. I used it constantly. So much, that I searched just now to see if it was possible to get it back, but only found this forum post.