Process terminated without establishing connection to debugger

I had to fix my old AIR application, so I found the source, downloaded and set up AIR SDK, but when I tried to compile it I got an error saying “Process terminated without establishing connection to debugger…”. Thanks the Internet and blog.empiregpservices.com, where I found out that I should just change runtime version in application config.

<application xmlns="http://ns.adobe.com/air/application/1.1">

change to

<application xmlns="http://ns.adobe.com/air/application/1.5">

And now it works.