1Click 'Open database(s)' toolbar button:
In the opened dialog 2specify database connectivity options and 3click 'OK':
4wait a bit for a progress:
5Click on total or changed count for interested object type, for example Stored Procedures
In the opened Object list tab 6click on the required object name:
And here is the Text diff tab with result:
In the Pro version you can also 7choose to show only new and/or changed lines: