VEP 5 not showing Preferences window

[Pyre]

Hi all,

I'm a long-time user of VEP 5, I like it a lot. I'm using it for the first time as a VST3, since my newer computer setup will run that. But I'm finding that when I open the Preferences menu, the menu doesn't actually get shown. When I click anything on the interface afterwards, it makes the usual 'can't do that' notification sound. This suggests to me that maybe the Preferences window is open, I just can't see it, like it's stuck behind the main window or something. And that until the Preferences window is closed as normal, the rest of VEP isn't accessible.

The only way I can get out of the situation is to end VEP using the Task Manager, but there's no suggestion there that VEP isn't running correctly. Again, this makes me think the window is open but somewhere I can't see it.

I am running VEP as a VST3 in Cubase 10.5, if that makes a difference in this scenario. Any thoughts on what's going on and how I can fix it please?

Thanks!