We are updating the application on regular basis. You can track the changes here.
The UX at the task page is changed totally. Now you can reach the variables and logs panels at the bottom of the page. Also, the actions page has been removed. You can add actions by clicking '+' icon
Some of the steps, you supposed to insert some sort of js expressions. From now on, you don't need to worry about this. It's all handled by the system.
You can add the logic of the 'If' statement by selection from the drop-down options menu.
Every single input text fields inside of the steps have a 'variable button' at the right side of them. By clicking, you can insert variables to the input fields very easy without worrying about breaking things.