I installed and loaded Notability on a new iPad today. All the notes were restored from iCloud, but all the Subjects and Dividers are lost. According to Notability help the subjects can be restored (open “information” and tap “support” three times). Dividers cannot be restored. And all the notes are not contained in their subjects any more. So a complete, manual reorg would be needed. And, the error of missing subjects and dividers was propagated automatically to my other devices,
Ugh. Notability is now dead to me.