When I open the first screen and click on change directory, it takes me to the Audiobook file in my download folder. When I click on that folder it is empty, while if I click on it from Explorer, it has several book. I have been sure that there are no hidden folders or files, and I am not too sure how to correct this problem.
You can just click "Select folder" there. It's a directory picker, so it'll load your audiobooks.