Before I submit a bug in JIRA I wanted to ask if others can confirm this problem (or suggest a workaround).
In Activiti Designer 5.14, form properties cannot be selected in the Properties tab for editing in Eclipse Indigo SR2.
To reproduce the problem, create a new Activiti Diagram, drag a Start Event onto the diagram surface and then choose the Form tab in Properties. Click New, fill in the form properties (id, name, type etc). then OK.
Try to then select the field and click Edit. Clicking does not select the field and clicking the Edit button does nothing.