Another user has confirmed that CGX-AGA is not compatible with AmiWolf.
Coming back to this, I've searched through all my startup-sequences and system folders, and there's no sign of CGX-AGA or CyberBugfix; I dunno if they don't come with ClassicWB Lite, or if the guy who set it up for me removed them, but they don't seem to be present. Any further ideas on what might be causing this issue? ScummVM-AGA-030 is also hanging when I try to launch it...