public void switchToRelease(final String releaseVersion){
  int idx=contentFolder.lastIndexOf("/");
  contentFolder=Paths.get(contentFolder.substring(0,idx),releaseVersion);
  wwwFolder=null;
  downloadFolder=null;
}

public void switchToRelease ( final String releaseVersion ) { int idx = contentFolder . lastIndexOf ( "/" ) ; contentFolder = Paths . get ( contentFolder . substring ( 0 , idx ) , releaseVersion ) ; wwwFolder = null ; downloadFolder = null ; }
switch model to another release .
