numbers 3.1 won't update
I have numbers 3.1 and an older version on my imac. when i try to open a file created on the latest version of Numbers it wont open and tells me to update (this in itself is very annoying). When i go to the app store it trys to sell me numbers - i own it already.
what should i do.
iMac, Mac OS X (10.7.1)