What does this means?? (Map editor)

When I enter the map editor, a message is displayed on top: "This is a preview version of the editor. Saving is currently disabled"

what does that mean?

That only the Silverlight Map editor is available, not the HTML5.

Scritto da Columna Durruti, 21.12.2016 at 12:32

That only the Silverlight Map editor is available, not the HTML5.

Thanks

Them I have to download the silverlight version to use it?

I cant edit maps in silverlight version >> In map editor i clic on "create map", than on "create" but doesn't open, there is some reason?

By the way: If i install windowns 2000 it will works? like it sayd in " Option 3: Play with another browser

Silverlight compatible browsers are listed here. "