Has the HALion Sonic SE content been installed?

I just installed v7.5 from the downloaded iso images (the full not the update). I had both images mounted at the same time. When the installer was finished, I did not get any instruction to launch the “HALSonic SE Content 2” installers.
Does this mean that the main installer ran these automatically?
How do I best check that the HALSonic SE content has been installed correctly?