Currently, a package exported from TE doesn't include the custom file type used by TE to create a project. The user needs to add manualle the custom file type to the settings of the project in Studio which is not normal. The custom file type should be exported along with the TM, termbase, reference file and should be included in the exported package. That issue causes errors in Studio. The user can't use the Preview functionality of Studio nor the Save Target As functionality of Studio.