When I complete installation and click "Generate installation file a properties" installer generates following XML file with following entry:

<productVersion>7.3.0</productVersion>

and running it works.
However when I change it to correct one

<productVersion>7.5.0.redhat-00002</productVersion>

an error is displayed:

ERROR: The configuration file specified was generated by version 7.5.0.redhat-00002. It is not compatible with version 7.3.0.
Please use a configuration file generated by the version of the installer you are running.

The error message suggest that the installer "thinks" it is of version 7.3 and causes a great deal of confusion to the user.