Start by going into your AppScenic Account, click on Products then on My Products.
Now find the product you want to update the board(s) for.
From now on, you can do this in two ways:
1. Click on the title of the product and you will land on its page.
On the top right corner of your product page, just under Product Status, you have Product Groups.
Under Product Groups, you will find Board(s).
Now, just click on Board(s) and make your changes. Click Save and you are all set.
2. From the My Products list, select the product you want to update.
On top of your product list, you can find the tab Update Board(s).
Under Update Board(s) you can choose either to Add to boards or Remove from boards.
After you made your change, click on Save.
And this is how you update the boards for a product. :)