Cax File Creation

hello im looking to make a cax file. ive been able to get some ive found on here to work correctly. the problem I am having is if I create one on note pad it doesn't save it as a Cax.File saves as a Text.file what am I missing. do I need to download some program for saving in cax. any help guys is greatly appreciated. got a few XDF files I use with hptuners I would like to be able to use with my Roadrunner and EFI thx.

Should be able to save as plain text and make sure the file extension is ".cax". If your text editor doesn't allow changing the format, save as .txt and then manually change from .txt to .cax in Windows.

When you are going to save in "save as", in the part "file type" choose all!
enter the filename with ".cax" at the end.