Clear Solution Cache
Scene Composer uses for opened solution a solution cache, which is stored in %appdata% directory of the user. In some cases the clear of the solution cache might fix the one or other problem (e.g. working in teams on the same solutions).
By clicking on "Clear Solution Cache" in the File menu, the cache of the currently opened solution will reset.reset This(this includes removing cache files, reset the file index and configuration table.table). The solution itself will not be modified, just the cache, used by Scene Composer, will be reset.