My Win 10 local data seems to be intact. I have not synced data or added any new notes to cause a sync.
I have synced my android devices and both exhibit same data corruption - part way down the list of notes, multiple copies of a note appear, perhaps a hundred copies. Then at the end, the last few notes appear.
The same duplicated note shows up on both Android devices, which leads me to think tghe on-line data has been corrupted.
Is there a way to replace the on-line data with my win 10 local data which seems to be OK?