Oh by the way, can I mine with this coin with different computer using my one account? or is it required to create another one per device? let me know please. Thanks again.
I know you can have the same payout address in multiple devices, as far as the same account i'm not entirely but I would guess so! Someone will surely give you a definitive answer

You should also research about Gulden Witnessing (staking), it's an awesome way to passively capitalise on your Guldens even while you mine.