Sorry, you must read the manual or ask better questions.
https://www.scirra.com/manual/37/file-menu
https://www.scirra.com/manual/122/testing-and-publishing
Ask better question?!! the file that linked has been saved in newer version of construct2 (252) and the construct2 i am using is older version (244). i only asked if you can re-save it in lower version or not?