Siegfried MEUNIER-GUTTIN-CLUZEL schrieb:
So I think you must un install any previous version of MiKTeX if you want an update...
No, MiKTeX is not touched. MiKTeX 2.7 is only installed together with LyX when you don't have MiKTeX already installed. An update from MiKTeX 2.6 to 2.7 is in general only possible by uninstalling MikTeX 2.6 and then installing (manually or together with LyX) 2.7 , but it is possible to install MiKTeX 2.7 side-by-side to an existing MiKTeX 2.6 installation (http://miktex.org/2.7/Setup.aspx). I haven't tested how it works to have two MiKTeX versions installed side by side. But in case you have this, LyXWinInstaller will set up LyX to use the latest version (in this case 2.7).
regards Uwe
