Home > SQL Developer Dialog Boxes ... > Configure File Type Associa...
This dialog box, which is displayed the first time you start SQL Developer, enables you to associate certain file types with SQL Developer. If a file type is associated with SQL Developer, files with that type's extension will automatically be opened by SQL Developer when you double-click the file name. Any previous association for that file type is replaced.
If you do not associate a file type with SQL Developer, any existing association for that file is unchanged.
After you close this box, you can change the associations for these file types and many others by clicking Tools and then Preferences, and selecting File Types (see File Types).