Good on you Paula!
I am also struggling with Jupiter at the moment. I have been out every night for over a week now, and every night the seeing is bad
What's the point being on holidays if you can't enjoy your astronomy!!
I agree with jjj, Autostakkert seems to do a better and faster job at stacking AVIs. You can choose to sharpen the stacked image in Autostakkert or import it in Registax and sharpen it with the wavelets there.
Clearer skies.
Eric