Numbers is a good app, especially if you've used Excel before this. When you open the numbers file in finder, it probably opens it in Preview. Preview will be used to open many file formats in it's viewer if you don't have the native app installed.
When you install the Numbers app, it should change the "open with" attribute to Numbers.
The described message is odd.
The license of the trial version clearly state that when it is expired we may use it as a reader of existing documents.
What may be required, is to apply the late updates but it's an other problem.
If the apps are in their required location which is in the folder
Run Software Update to apply the recent updaters which may be what the syste; is in fact urging you to do.
Yvan KOENIG (VALLAURIS, France) mardi 3 mai 2011 16:36:22
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To be the AW6 successor, iWork MUST integrate a TRUE DB, not a list organizer !
Hi all, thanks for your suggestions chaps, of course iWorks came with the computer and my Trial period has now obviously run out (expired) and i have now done the right thing and purchased a proper copy of it from the App Store, yippee, so i will now have best organised bank account and budget in the land NOT !.
Thanks again for all your suggestions etc. sorry i can only award one "correct answer"