Revision history [back]
Not sure if you have Wing 12 or 12.1. Wing 12 should be the same. The only thing I can think of is you downloaded Wing 101? That seems unlikely, but in 101 the green arrow runs rather than debugs.
In 12.1, he debug tools moved to the right end of the toolbar if you opted to use the modern UI and should otherwise work the same.
Not sure either of these would explain it, so we may need more information and your ide.log, which you can send us from the Help menu with Submit Bug Report.