I've been using it for a week or so, and I only have praises for this tool. But here's some feedback in no particular order that you might be interested in:

• Ctrl-G would be cool if it auto-completes any events/regions. Even when typing a number it should immediately jump while typing to give immediate feedback
• Selecting text and then pressing Ctrl-T should not fill the text field, especially if it was several lines of text being selected. At least have the pasted text in the field already selected so it can be easily overwritten by typing something else.
• Support for multiple return types jsdoc e.g. {(string|real|bool|undefined)}. It was complaining with warnings about not being able to convert (string|real|bool|undefined) to bool.
• Would be cool to have a view to see all the warnings in all the files (similar to GameMaker editor were it lists all the warnings)
• Would be cool to be able to split the view horizontally (or vertically) in order to be able to have multiple tabs visible at the same time, e.g. an Output tab below while a game is running.
• Cannot use Ctrl-T with files in the Included Files folder