Paper format view issue

I'm used to having the 'Paper' view format (left image below), where you can select from several in a list on the fourth icon down (on the right of the Bryce view interface...etc.,). Problem is for some unknown reason I opened a file and the damn thing showed a different format (right image below - note the sky shows up, too).
Now, I've clicked this fouth icon by mistake in the past, and found I had to go through several tries before I got back to the 'paper' option I prefer (lack of Bryce experience, essentially). However, trying again to get back to the 'paper' format from the fouth icon...etc., this time, I just can't get back to 'paper' view. Any advice? Presuming it's a corrupt issue, will I lose all previously-saved Br 7.0 render files if I have to reinstall.
I'm probably missing some obvious option, so forgive my stupidity.
Cheers
Jay


Comments
Looks like you have OGL preview on. You turn it off by clicking and holding (for a couple of seconds) the cube icon above the Zoom icons at bottom right and selecting wireframe preview.
What Dan said.
So much disappoint that you can't do shift-click animations with OGL options :(
Aha, thank you, Dan (Oroboros, too) - that solved it. I must have inadvertently held the cube too long at one time where the switch took place. I hate when simply-fixed problems like this occur, and then my ignorance of Bryce comes to fore.
Cheers, again ;)
Jay