Can you verify that your blocks are indeed stored in this directory?
Code:
C:\\Users\\Owner\\AppData\\Roaming\\Bitcoin\\blocks
Block folder is 302GB, with numerous block files.
Just to be 100% sure, when you run Bitcoin Core, what value is displayed as your "blocksdir" when you open "Window - Information"? 
If that says C:\Users\Owner\AppData\Roaming\Bitcoin\blocks then that setting is just fine...
It's quite possible, that running the older version has resulted in some incompatibilities in the Armory database(s)... You can try the "Rebuild and Rescan Databases" option from the Help menu in Armory and then restart.