If you have installed the mobile Run Time Environment (PROCE55 RTE) from a mobile app store, whenever there is a new version of the RTE, you can do the update. All the installed PROCE55 apps remain installed and will work with the newer version of the RTE. If you remove (uninstall) the PROCE55 RTE from a mobile device, all the PROCE55 apps and settings will be removed as well.
To gain more control over the distribution of specific versions of the PROCE55 RTE in your network you can use your local mobile device management solution.