Adding (failing to add) a toolbar button in Acrobat DC Pro 15.02

Greetings,

I created a working menu item that removes, or scalps (as my user calls it), the first page of a pdf.

I am attempting to add this as a toolbar button.

Following the documentation, I wrote the following code, which I added in the Javascript folder of Acrobat DC Pro (15.02020039).

I ensured that my jpg used for the icon is 20x20. The dummy pdf is just my business card.

I placed both the jpg for the icon and the dummy pdf in the Javascript folder.

I added all this here for your convenience: AddButton - Google Drive

When I start Acrobat, nothing happens, in terms of having my button anywhere under 'Tools'.

Being this is my first button... I beg for some guidance

Here's the code I have:

var LoadScalpPdfButton = app.trustedFunction( function ()

{

   if ( typeof LoadScalpPdfButton == "undefined" )

      ScalpPdf = true;

   else

   {

      if (!LoadScalpPdfButton)

      {

         app.removeToolButton("ScalpPdf");

         ScalpPdf = true;

         return;

      }

   }

   if ( ScalpPdf )

   {

      app.beginPriv();

      // Get the path to the user JavaScript folder

      var atbPath=app.getPath({cCategory: "user", cFolder: "javascript"});

      try

      {

         // Try opening the icon doc as in hidden mode, and retrieve its doc

         // object.

         var doc=app.openDoc({

            cPath: atbPath+"/dummy.pdf", bHidden: true});

         } catch (e) { console.println("Could not open icon file"); return;}

      // Get the icon stream for myIcon1 from the hidden doc

      var iconPath = atbPath+"/scalp.jpg"

      doc.importIcon("scalped", iconPath, 0);

      var oIcon = util.iconStreamFromIcon(doc.getIcon("scalped"));

      // Add a tool button using this icon

      app.addToolButton({

         cName: "ScalpPdf",

         oIcon: oIcon,

         cExec: "ScalpPdf();",

         cTooltext: "Scalp this Pdf",

         nPos: 0

      });

// Close our hidden document containing the icons.

   doc.closeDoc();

   app.endPriv();

   // Set this variable to signal that the toolbars are installed.

   LoadScalpPdfButton = false;

   }

})

var ScalpPdf = app.trustedFunction(function()

{

   app.beginPriv();

    if (app.activeDocs.length > 0)

    {

      this.deletePages({nStart: 0, nEnd: 0});

      var myDocPath = this.path;

      var aPathComps = myDocPath.split("/");

      aPathComps.pop();

      aPathComps.push("Scalped.pdf");

      var strNewPath = aPathComps.join("/");

      this.saveAs(strNewPath);

    } 

   app.endPriv();

});

Thank you for your advice.