How to force RapidMiner project .rmp file to export and save in .rmp instead of in .pdf file format?

Hi, I am new here. I have created a project in the RapidMiner and when I save the file by going File>Export Process>Folder Name then the RapidMiner file is saved in .pdf format and not in .rmp format. I would like it to be in .rmp format. How can I do this? Any suggestion will be greatly appreciated. Thank you.