If you want an example of a really non-intuitive user interface, try loading a Program into a free slot in Halion 3.

After spending the best part of one hour trying to decipher the PDF manual, I ended up trying drag-and-drop. Which worked fine, except, there’s a bug which means that where Halion thinks your mouse is, isn’t where it actually is. So your drag-and-drop operation has to be tentative, and generally ‘in the right direction’ until the correct part of the GUI highlights. And, if you move the Halion window, your drag and drop behaviour will change too, or not work at all.

And, why do I have to continually (once on each launch of the Cubase project) tell Halion where to find project-specific samples? Why doesn’t it remember? Even if they’re in the presets of the Halion installation? Actually, it does remember… But, if you have multiple sound banks in one folder, don’t select them all when ‘locating’ Halion content, because Halion only loads the first sound bank. You have to select just the one, for Halion to load them all.