Help page.

Add new deck - click on hero's image or gray rectangle in the top left corner.
Remove deck - Special button in bottom of deck window.
Add a card to deck - drag and drop a card or double click.
Remove a card from deck - double click on item string.
View fullsize card - Right click on card. You can drag fullsize card.
Close fullszie card - Double click on fullsize card.
Update deck stat - Double click on stat area.

PS: For share your decks, you can copy a link from address bar.

My nickname on http://www.shadowera.com is melazyk
You can email me nikiforov.ks@gmail.com ))