Upgrading the Memsource Editor is a completely automated process which requires no user action. Once a new version is released, Memsource Editor downloads it in the background. The next time the user starts it, Memsource Editor will open the upgraded version.
It is possible, however, that certain users may be running old versions. This can occur if they, for example, have not worked in Memsource Editor for a long time, and therefore the Editor could not be upgraded. Because of this, there is an additional check that will prompt a warning for the user to upgrade to the newest version manually if their current version is extremely outdated.