Open a file by clicking on the open file toolbar button or selecting File, Open… The File Open dialog will appear. Select the File you want by clicking on it with the mouse and then click the Open button.
When you open the script, it may reformat. If it reformats, the File, Save menu item will be available. If it does not reformat the File, Save menu item will be grayed out because there is no reason to save a document that has not changed.
Scripts are formatted using the fonts of the default printer. Printers do not all render Courier 12 pt (or any other font) identically. And how the font renders determines how the text in the script breaks. So, when a script is opened by Screen Writer Studio, it compares the font used to format the saved document with the font in the present default printer. And if they are different, Screen Writer Studio will re-format the script.
With all that said, even when the font renders differently, it will almost always break the same on the page. However, because it could break differently, Screen Writer Studio reformats the file when it reads it in.
Screen Writer Studio will also reformat the file if it was saved with a different version of Screen Writer Studio. This is done in case there is a difference between the two versions in how they break text.