When I apply a FX to a clip (in this case a import VR) I can not get in to the Visual Editor by double clicking.
Is there a key or workaround for this?

Hi!

I think that may be a problem of the evaluation range. Every effect in Mistika has an evaluation range which decides what clips are being affected. If your evaluation range is not pulled down, then if you double click on it you won't find anything inside the visual editor, because anything is being affected. Just select it (it's a white rectangular box) and pull it down:

 

Hope it helped!

Cheers,
Cristóbal