Have Today's Date Entered

In download file name you can not use / caracther you can use -

For today date i use this

{
  "Command": "executeScript_Sandbox",
  "Target": "var d = new Date();var m = ((d.getMonth()+1)<10) ? \"0\" + (d.getMonth()+1):(d.getMonth()+1);var day=d.getDate()<10 ? \"0\" + d.getDate():d.getDate();return day + \"-\" + m + \"-\" + d.getFullYear();",
  "Value": "Date"
},