Unfortunately, one function for OMA analysis was not updated for the new GUI based stabilization diagram in release 2.0.
There is from now, a new subrelease 2.01 to take care of this error. If you are interested in OMA you should obtain this subrelease by downloading the zip file again.
The easiest is to download the matlab files only from here. Make sure you are logged in before clicking the link.
Sorry for the inconvenience.