Today I checked for any software updates available for elementary OS Freya through the Software Updater which is provided by the system. Then it notified that my system is up to date but however elementary 16.04.1 lts is now available and it asked me to upgrade the system. To get the complete image file [ISO] I went to elementary OS official website, but in there it provides only the Freya release. Why is that and if I upgrade through the Software updaterwill my machine be upgraded to the Loki beta version or the lts version. I am little confused as lts version is still not provided in the official website.