You can Cntrl+Shift+E for a one time access to the export dialog.
@Mario, Thanks for the update π .When I tried this I got a dialog saying I couldn't export cause I haven't selected an output directory, then the export dialog appeared. Is there a way to manually clear the selected output directory? If so I'd be able to access the export dialog again right now. Even if it's opening an hex editor and manually editing the project file or is there a user settings file I could delete. I too urgently need access to Spine's exporter.