Reads multiple text files, with each file having options for loading.
To remove files from the list select the file and press the 'Delete' key.
To select all files in the list press Ctrl-A.
To add all files that match a pattern, using an asterisk (*) into the dialog "File Name" field. Press return, and the file filter will show up in the "Files of Type" drop down, then press Ctrl-A to select all of the files that show up with that filter. The list of files will then show up in the "File Name:" field, space delimited with double quotes around each file name. Then press "Open" to load all of those files.