• Install the program
• Click Start - All Programs - Spacejock Software - Sonar 3
• Sonar will then start with a blank screen:

If you already have a Sonar2 database, click File - Convert Sonar2 Database and follow the prompts.
If you are starting from scratch, you have to click File - New and enter a new Sonar3 filename. The default is 'New Project.sonar3', but you may like to rename this.
You'll now be returned to the Sonar3 main screen, with your new empty project ready to use. At this stage you can drag the screen to make it larger, which will make the information easier to see.
Before you can add a submission you need to add a market and a work (e.g. story, article, poem, image, photo, etc.) Just click the relevant menu heading then 'Add'. Fill out the title, which is mandatory, and then any other fields you want to recall later.
Once you have a market and a work in the database, you can click Submissions - Add. Choose the market and the work from the drop-downs, fill out the details and click save. The main screen will be updated to show the submission along with useful details like the date submitted, what the status is, and how much you've earned from your work.
Please note - there's one major difference between Sonar2 and Sonar3 ... with the latter you can have multiple databases with separate information, and you can open them via the File menu or by double-clicking them in Windows Explorer.