At Computer für Audioanwendungen - WaveLab - Steinberg Forums Matthias says
Sorry for the inconvenience. We can confirm that there are issues with the Windows installer and with the MegaTrig module and we are already preparing a 5.1.1 update that will fix both issues.
As the MegaTrig issue may cause crashes, should this be a sticky until the update is released?
Should the Halion download page http://www.steinberg.net/en/support/downloads/downloads_halion_5.html be similarly noted?
Thanks
Raymondo