Building the Postcard and Portability Shield handheld receiver. I downloaded the enclosure step file and see that there is a hole over the mode button and the battery connector on the front cover. The mode button and the cover were not part of the file. Is there a separate 3D file for the mode button and/or the battery connector cover?
No - the idea being that users will likely need to navigate settings and swap power sometimes
In your 3D slicing program you should be able to add a small plane or rectangle primitive and combine it with the model to cover those sections