According to http://faq.doit.im/web.html i can drag&drop project to goal or right click it. I cant do neither of those, project is not dragging, on right click im getting context menu of browser.

Checked on Mozilla 64.0.2 and Google Chrome 71.0.3578.98 (the latest versions for now (27/01/2019)). Also updated adobe flash player.

Please tell me how to do it or at least how to have subtask of subtask or something like this.