User blog:MasterBroccoli/Genie Editor 3

Hey guys. I have a problem with the Genie Editor 3 and hope you can help. I'm putting this in a blog because I think I may have another question later and maybe others get inspired to try it out as well. :) Here is my problem: When I open the program, two windows pop. One with the Editor, that's fine, and the other one called 'Open files...' which is obviously there to import of find data. Good so far, but when I click open, I receive a message: 'No File: ' and that's it. I checked, the file is there, but I cannot open it, because it is a .dat file. Whenever I watch guides on youtube no one ever has issues there, so I don't know what I'm missing. I guess that is an easy fix, but I'm too stupid and would very much appreciate help there. :)