You will have to install QloApps again to update your version.
so if you do not have live data then please install the latest version of QloApps all along.
And if you have live data and you want to update your QloApps then you can opt for our QloApps Upgrade Package.
In this service, we will upgrade your QloApps to the latest version without any data loss. https://store.webkul.com/QloApps-Upgrade-Package.html