Hello,
Here is the way that I bring in files. After opening the file menu and hitting enter on "add files," I navigate to the folder of files I'm wanting to burn. Once in that folder, I select all the files I'm wanting to burn and then tab down to open. This moves all those files into Express Burn. Most times, I creat a folder and put those files I want to burn into it, so that those files are the only ones I have to deal with.
Hope this helps!
Lewner