If an application is running right now, you can quickly open its dictionary.

• Choose File > Open Dictionary. In the resulting hierarchical menu, you’ll see a list headed “Running Scriptable Applications”. Choose an application from the menu, and its dictionary will open.
• Alternatively, if what you want to open is the dictionary of the frontmost application, use Script Debugger’s Dock menu. This contains an item, Open XXX Dictionary, where “XXX” is the frontmost application. Choose it, and Script Debugger will come to the front with that dictionary open.