Hello Adri,
Please first:
- Make sure that you're using Hauptwerk v5.0.1 (not v5.0.0). You can check via 'Help | About Hauptwerk' in Hauptwerk.
- Make sure that Hauptwerk reports at least a few GB remaining as 'free' once those particular organs have been loaded. (If you over-fill the computer's memory then it make freeze or crash.)
- Test the computer's RAM to make sure it doesn't have any faults. (If you're using Windows 10, then here's one article that explains how to do that: https://www.windowscentral.com/how-chec ... windows-10 .)
- Make sure the latest drivers are installed for your audio and MIDI interface(s), and any other hardware on the computer.
If those things don't solve it, then please create a diagnostic file (Help | Create a diagnostic file') and send them to Francois at support [at] hauptwerk.com.