Thanks to you !! I've just send you a part of the extract file via PM.

There are items for 5 groups in there :
"Atlas Copco"
"Friends-Amy"
"Friends-Eliza"
"IBM"
"Persoonlijk"

The itemnames are always separated from the groupnames with a dot, in the first line. Subsequent lines are the fields in the item, always "Label": "Value"
Notes fields strat just with "Note:", the value can already start on the same name of the label. Multi-line. Hard thing might be recognizing when a note field value ends and what's the start of a new record ....

Let me know if I can provide more info or help testing.

Cheers.