It opened well now using this command line.
F:\Crypto\Armory\ArmoryQt.exe --datadir="F:\Crypto\Armory\user" --satoshi-datadir="F:\Crypto\Armory\core" --dbdir="F:\Crypto\Armory\user\databases"
That's now preparing the DB. How can I know it's actually doing this in order to avoid waiting without it being doing nothing. Thanks.