Does anyone know where to find "Image Processor Pro"

I used the following script (excuse all the extra notes for myself - I'm a beginner & learning). I ran this script for my templates one-by-one and it worked. I am still trying to work out what I need to change in order for it to work in IPP. Any advice would be appreciated.

// FILL LAYER TO CANVAS  

// Ref: JJMack, https://community.adobe.com/t5/photoshop-ecosystem-discussions/scale-layer-to-current-canvas-size-photoshop/td-p/5217315/page/2

var imageLayerWidth = app.activeDocument.width.as('px');  
var imageLayerHeight = app.activeDocument.height.as('px');  
var bounds = app.activeDocument.activeLayer.bounds;  
var LWidth = bounds[2].as('px')-bounds[0].as('px');  
var LHeight = bounds[3].as('px')-bounds[1].as('px'); 

var userResampleMethod = app.preferences.interpolation;  // Save interpolation settings  
app.preferences.interpolation = ResampleMethod.BICUBIC; // resample interpolation bicubic  

if (LWidth / LHeight < imageLayerWidth / imageLayerHeight ) { // if the image layer Aspect Ratio is less than the Canvas area Aspect Ratio   
   
   var percentageChange = ((imageLayerWidth / LWidth) * 100.25);  // Resize to canvas area width  
   activeDocument.activeLayer.resize(percentageChange, percentageChange, AnchorPosition.MIDDLECENTER);  
   }  

else {
   
  var percentageChange = ((imageLayerHeight / LHeight) * 100.25); // Resize to canvas area height  
  
  // resize - pass in horizontal, vertical, anchor in the parameters
  activeDocument.activeLayer.resize(percentageChange, percentageChange, AnchorPosition.MIDDLECENTER);  
   }
   
   // FYI Anchor positions can be:
   	// BOTTOMCENTER, BOTTOMLEFT, BOTTOMRIGHT
   	// MIDDLECENTER, MIDDLELEFT, MIDDLERIGHT
    	// TOPCENTER, TOPLEFT, TOPRIGHT
     
app.preferences.interpolation = userResampleMethod; // Reset interpolation setting  
app.activeDocument.selection.selectAll();

// ALIGN call from function below
align('AdCH'); align('AdCV');
app.activeDocument.selection.deselect();

   // FYI
	/* 
	AdLf = Align Left
	AdRg = Align Right
	AdCH = Align Centre Horizontal
	AdTp = Align Top
	AdBt = Align Bottom
	AdCV = Align Centre Vertical
	*/

// -----------------------------------------
// Align Layers to selection function
// -----------------------------------------
function align(method) {

  var desc = new ActionDescriptor();
  var ref = new ActionReference();
  
  ref.putEnumerated( charIDToTypeID( "Lyr " ), charIDToTypeID( "Ordn" ), charIDToTypeID( "Trgt" ) );
  desc.putReference( charIDToTypeID( "null" ), ref );
  desc.putEnumerated( charIDToTypeID( "Usng" ), charIDToTypeID( "ADSt" ), charIDToTypeID( method ) );
  // FYI charIDToTypeID is a Method with a parameter type of string, returns a number
  
  try {
  
  executeAction( charIDToTypeID( "Algn" ), desc, DialogModes.NO );
 // FYI 'Algn' is an Event ID Code
  	
  } catch(e){}
}