Cannot change workspace in SoapUI 5.6.0
After just updating from 5.5.0 to 5.6.0 it is no longer possible to switch workspace or to start a new workspace. All the right dialogs appear, but after clicking Open or Save simply nothing happens and the workspace started up with sticks where it is...
Tried it running SoapUI in Administrator mode: no difference. Tried completely uninstall and reinstall: no difference. Reverted to use of SoapUI 5.5.0: all is working well again.
This definitely seems to be a major bug.
This all BTW is on x64 Windows 7 (yes, I know!)...
Unable to revert to 5.5.0 since, I uninstalled that version and also, not able to find the 5.5.0 version to download it again.
Please suggest to me it is a very necessary tool for me.