How to edit userscript ?

Question

userscript

function appendNewTotal() {
  var newTotal = (parseFloat($('.account_current').contents()[0].textContent.replace(/[^ 0-9]/g,'')) / 100 + MONEY).toFixed(2).toString().replace('.',',');
  if (newTotal.indexOf(',') == -1) newTotal += ',00';
  $('.account_current').contents()[0].textContent = newTotal;
  $('#person-accounts-RUB').contents()[0].textContent = newTotal + ' RUB';
}
function delayedAppend() {
  if ($('.account_current').size() == 0)
    setTimeout(delayedAppend,10);
  else
    appendNewTotal();
}
delayedAppend();

There is a code, it changes the value of the sum to kiwi , after the update everything has fallen off and now it looks like this