The link is correct .It is the e-on side that won't let you go there . http://www.e-onsoftware.com/support/forum2/viewtopic.php?t=2214 . The topic name was : Bug !-Cannot save rendered Picture .The solution so far: Delete the doubleslash and make it a singleslash in the render to disk path and save your scene. I am really glad, that I am not the only one ;)  .      Wow copy/paste forum topic makes it a link.Didn't know that .