Since version 4.5.2 TestCase Editor is not opening.

I've seen that teamdev jxbrowser librairies have been updated from the 3.0 to the 3.3 version, maybe that's the problem

MarioP you can desactivate the embedded browser, this should fix your issue
- in the preferences, use the UI Settings, and desactivate the browser
- otherwise, add the following options in the soapui.bat: -Dsoapui.jxbrowser.disable="true" (the line is already present, just uncomment it)