I dont know why HP has it written the way it is. All I can offer is an alternative solution using VueScan.
HP ScanJet 8200c Driver and Software | VueScan
It may or may not be what you want but it looks like its the only thing available.
II believe its comes as a free trial, then you would have to purchase it.
We are all volunteers here, and dont speak for HP.
Good luck.