Is it possible to put any type of file into the navigator and have it keep it’s extension instead of having it turn into a binary file?
I don’t believe so. What are you trying to do? Could you accomplish it by adding your file to the resources of your app and accessing it there?
You mean create a resources folder? How exactly does that work?
Use a Copy File build step to copy the file to the Resources folder.
More info about this is in User Guide Book 3: Framework, Chapter 9: Building Your Applications, Section 2: Build Automation.