diff --git a/app/assets/javascripts/swf_assets/show.js b/app/assets/javascripts/swf_assets/show.js
index 66aa24ac..ee5446d5 100644
--- a/app/assets/javascripts/swf_assets/show.js
+++ b/app/assets/javascripts/swf_assets/show.js
@@ -150,13 +150,13 @@ function updateStage() {
 
 function updateCanvasDimensions() {
 	// Set the canvas's internal dimensions to be higher, if the device has high
-	// DPI. Scale the movie clip to match, too.
+	// DPI. Scale the stage to match, too.
 	const internalWidth = canvas.offsetWidth * window.devicePixelRatio;
 	const internalHeight = canvas.offsetHeight * window.devicePixelRatio;
 	canvas.width = internalWidth;
 	canvas.height = internalHeight;
-	movieClip.scaleX = internalWidth / library.properties.width;
-	movieClip.scaleY = internalHeight / library.properties.height;
+	stage.scaleX = internalWidth / library.properties.width;
+	stage.scaleY = internalHeight / library.properties.height;
 }
 
 window.addEventListener("resize", () => {
@@ -176,23 +176,28 @@ window.addEventListener("resize", () => {
 ////////////////////////////////////////////////////
 
 async function startMovie() {
+	// Install the MotionGuidePlugin, which is needed for motion path animations.
+	createjs.MotionGuidePlugin.install();
+
 	// Load the movie's library (from the JS file already run), and use it to
 	// build a movie clip.
 	library = await getLibrary();
 	movieClip = buildMovieClip(library);
 
-	updateCanvasDimensions();
-
 	if (canvas.getContext("2d") == null) {
 		console.warn(`Out of memory, can't use canvas for ${libraryUrl}.`);
 		// TODO: "Too many animations!"
 		return;
 	}
 
-	stage = new window.createjs.Stage(canvas);
+	stage = new library.Stage(canvas);
 	stage.addChild(movieClip);
+	updateCanvasDimensions();
 	updateStage();
 
+	// Signal to the library that the composition is ready.
+	AdobeAn.compositionLoaded(library.properties.id);
+
 	loadingStatus = "loaded";
 	canvas.setAttribute("data-status", "loaded");
 
diff --git a/app/javascript/wardrobe-2020/components/OutfitMovieLayer.js b/app/javascript/wardrobe-2020/components/OutfitMovieLayer.js
index 0afd76c4..47ddf81a 100644
--- a/app/javascript/wardrobe-2020/components/OutfitMovieLayer.js
+++ b/app/javascript/wardrobe-2020/components/OutfitMovieLayer.js
@@ -390,6 +390,10 @@ export function loadMovieLibrary(librarySrc, { preferArchive = false } = {}) {
 			);
 		}
 		delete window.AdobeAn.compositions[compositionId];
+
+		// Install the MotionGuidePlugin, which is needed for motion path animations.
+		window.createjs.MotionGuidePlugin.install();
+
 		const library = composition.getLibrary();
 
 		// One more loading step as part of loading this library is loading the