Codecs gone missing?

Since QuickTime 7.5 update, the older codecs (so called “legacy”) are hidden by default in the export dialogs.
In your SimpleMovieX session, for example, Cinepak used to appear as an option for video encoding. It’s no longer the case.

Because QuickTime applies the “Don’t show legacy codecs” policy.

All the applications using QuickTime infrastructure for exporting, as SimpleMovieX, have the same “problem”.

To revert this, go to System Preferences, QuickTime, Advanced, and check the “Show legacy encoders”. And restart SimpleMovieX.