Is that the full path where the blockchain resides? It's not in D:\Bitcoin\blocks or something similar?
No, D:\Bitcoin\ is the home directory, and then D:\Bitcoin\blocks\ is where the blockchain resides. I tried it the other way, no change:
2018-01-16 06:18:41 (INFO) -- ArmoryUtils.pyc:1301 - satoshiHome : D:\Bitcoin\blocks
...
2018-01-16 06:18:44 (ERROR) -- BDM.pyc:197 - DB error: C:\Users\[user]\AppData\Roaming/Bitcoin/blocks is not a valid path