Batch exporting photos?

Hello, is there a way to select and batch export photos other than a bmp file. When I try to open this file in Photoshop, I get "Could not complete your request because it is not the right type of document." It also won't open in Microsoft Paint. It is incredibly difficult to get photos out of Blox. Is there another option that doesn't include opening each asset, viewing high-res and right-clicking to save?

Thanks