Is it true that Flex apps will only run in Player version 9?
Is there a way to compile your SWF such that it is compatible with
earlier versions? I.e. is there a subset of functionality that you
can use to ensure that your user won't have to upgrade just to use
your application? Thanks.
It is true that Flex 2 apps will only run in Player version
9. (Flex 1.5 apps will run in earlier versions of the player, but
undoubtedly you are asking about Flex 2.)
But the default HTML wrapper that gets generated for you by
Flex Builder uses "express install," which is a feature where if
the user has an older version of Flash, they will be asked if they
want to upgrade; and if they click Yes, then voila, they get the
new player version, with no more clicks required.