Thank you for the tip. I've managed to download but in safari console of my browser it delievers a lot of javascript errors, such as:
Error: Mismatched anonymous define() module: function (){function a(a){var b=a.toUpperCase().split(" "),c=[],d={"\u2190":37,"\u2191":38,"\u2192":39,"\u2193":40};return b.forEach(function(a){"number"==typeof a?c.push(a):d[a]?c.push(d[a]):c.push(a.charCodeAt(0))}),c}function b(){this._codes={},this._handler=null}return b.prototype._evaluate=function(a){for(var b in this._codes){var c=this._codes;c.index=a===c.keys[c.index]?c.index+1:0,c.index===c.keys.length