With a large number of FeX packages installed it is difficult to keep track of updates and modifications. Check4updates is a utility to keep track of such updates and provides the user with a handy interface where the user can select updated packages for downloading. The list of FeX contributions to track is contained in a separate function for easy Creation, modification and extension. The downloaded files are by default saved in a separate directory to allow the user to inspect/modify/verify before installing the updates.
*A modified function handle as input, that should return a file/directory-name FexId cell-array and require no input arguments, makes it possible to use this function as a package aggregator if one wants to distribute a package that requires a number of FeX contributions, simply make a function listing all required and suggested FeX packages and have the recipient run-download-install those.
Developed and tested in 2012a-2013a but nothing fancy is used, should work on far older releases.