Zero deck thickness in Open Bridge Designer

Dear All

Please I need help in these two issues.

1. I am modeling my cored slab bridge which has no deck. I am having an issue when deleting the automatically inserted deck, all the bridge model is gone. I have tried to make a new deck template with zero thickness, but no luck. Also when I transferred the bridge model to leap bridge concrete, I couldn't edit the thickness of the deck there. Any idea?

2. Also I didn't see any option to add approach slabs in Open Bridge Designer, any idea?

Thanks