var string = "[General]\nStartWithLastProfile=0\n\n[Profile0]\nName=default\nIsRelative=1\nPath=Profiles/vr10qb8s.default\nDefault=1\n\n[Profile1]\nName=cleanER One Here\nIsRelative=1\nPath=Profiles/k46wtieb.cleanER One Here";

​

string = string.split(/\n\n/g);

​

var matches = [];

​

string.forEach(function(elem, index){

  var matchArr = [];

  matchArr.push(elem); // wholeMatch

  elem.replace(/\[([a-z0-9]+)\]/i, function(match, $1){    

    matchArr.push($1); // title

  });

  elem.replace(/([a-z]+)=(.+)/ig, function(match, $1, $2){

    matchArr.push($1); // property

    matchArr.push($2); // value

  });

  matches.push(matchArr);  

});

​

console.log(matches);