I've just checked and the option is definitely there in the latest version. You could try clearing your browser cache just in case it's remembered the old schema file.That is strange. The one that doesn't work has sweeper 2.1.4-2 (no upgrade available) the one that works has 2.0.15-2 (with 2.1.4-2 available as an upgrade - but I don't want to do that as it doesn't seem to work). Is this possibly a bug in the latest version?