I use TheCartPress version 1.3.4, and WordPress version 3.8, when I would add an additional menu in apperance >> Menus (not showing anything), and if I want to see all the products in the Products> Products (not showing anything), and if I create a new post that I get the same Posts> Add new (not showing anything) the same as creating pages pages> Add new (not showing anything) before updating to wordPress 3.8 is still working,
