I received a "beta version expired" message
If you are a member of the beta program for Fade In and have been testing a pre-release build of the software, you'll need to contact the developer to receive an up-to-date version. (Beta builds have, by design, a time limit after which they are intended to be replaced by either a new beta build or the finalized release version.)
If you are not a member of any beta program and have gotten this unexpectedly, then it's an error: most likely an updated release package was built with the "beta" flag mistakenly still active. Please download the latest update from your personalized download link.