Bendgee, if you installed W10 by using the free upgrade from W7 or W8.1 you may reinstall it on the same machine by downloading the OS from Microsoft. Several threads on the forum explain exactly how.
If by 'app' you mean W10 then it should have received a major upgrade last November, several updates since and another upgrade is scheduled for August.
If by 'app' you mean some application that you loaded yourself then maybe, maybe not does it have updates.