Same here. Moved files exactly like the video tutorial explaines, and created the shortcut.

Is there anything I have to do to make the Bitcoin core app to know I moved it's files also? i suspect it has something to do with that

edit: just solved it.
1. Make a shortcut of you bitcoinqt and do this
"C:\Program Files (x86)\Bitcoin\bitcoin-qt.exe" -datadir="d:\BitCoinData" (this would be the directory you placed the files)

2. Open bitcoinqt with that shortcut (make sure armory is closed)

3. Then open Armory, it will ask to close your bitcoinqt, select yes. then starts syncing normally. At least for me!