Note: This applies to WorkflowGen versions 7.2.1 and earlier
Due to an incompatibility with the HTML5 workflow designer and Chrome version 58 (Windows and macOS), it’s not possible to double-click on an action to open the Edit action panel. This issue has been fixed in WorkflowGen version 7.3.0.
If you haven’t upgraded to version 7.3.0, there are two workarounds:
Edit the action in List view. In the graphical workflow designer, click List above the toolbar to switch to List view, then click on the action name to edit it.
Use a different browser or an earlier version of Chrome.