File Dialog
When ever you need to provide a file name for RPWiz you will do so through a File Dialog window.
Each Dialog window will only show you files of type appropriate for what you are doing.
Some Functions, for example Play SlideShow, allow more than one type of file. The most commonly used file type is pre-selected and displayed in the Files of type drop down list. If you wish to choose a different type file, click the down arrow on the window to see the other allowed file type & choose the one you're interested in.