It would be very helpful if the modeler or project UI can verify the used appstore modules and indicate e required or recommended upgrade. Also when a particular version of the modeler is not longer supported it should warn.
verifying the version of library files included would also nice
Making the AppStore some sort of module repository would be great. By adding metainformation to the downloadable packages I could also think of stuff like: Install dependencies automatically.
It should also be easier to update the modules (select the version you want by right clicking on the module, Version Control > [select version] > update to this version, for example: