If you 'long hold' on the shapes tool do you still only see Basic Shapes as an option? I've just done a quick test from Capture, which told me I could use shapes in Fresco. I launched Fresco from Capture. It didn't give me any indication of how to access my shapes but when I extended the tap on the Shapes tool it shows a Library Shapes and gives me my folder to select shapes from. It may take a little time for your shapes to appear.