Tried "full screen" mode now can't get to settings to change it back?

[uptown47]

Hi there
This is probably something I'm doing wrong but I just downloaded the trial mode and went into settings and switched it to full screen to try it. But now the 'settings' menu option has disappeared and I can't get back into settings to change it.
How do I do this?
Thanks

[Steve]

Hi Uptown, you can't switch to full screen mode in the Videobox trial as far as I know ?, do you have a serial number or license ?

[uptown47]

Hi Steve,
Thanks for getting back to me.

It's videobox that I'm using. You can see my screen here...

I can't exit the app either - when I'm in it I have to open Task Manager and kill the process.

I'm not going to get to trial it anyway as I've only got 6 days left now and I'm away on holiday tomorrow. But would be good to know what (if anything) I've done wrong?

Many thanks.