Fairly complex form with many rules, fields, panels, controls.  Went to launch form designer after doing a save and close, and now it hangs on Please Wait message.  Checked with multiple browsers, rebooted, etc.  Simpler forms on same site still editable in design tool.  The complex form still runs with last published version.

Thoughts on methods to trouble shoot?  I am not an admin, but can engage admin easily.

Thanks!