You can add images to shapes in your purchased template.
Upload a Photo
To upload a photo, select the elements pane on the left hand side and click the upload button. You'll be prompted to choose a file from your computer. Once the file is uploaded, simply click or drag it to add it to the template. Size it up or down to make it slightly larger than the shape by using the corner anchors or scale button in the tool bar.
Add Image to Shape
Hold the image over the shape for a few seconds. You'll see the sample image (from the template you purchased) replaced by your photo.
Can't Get it to Work
If you accidentally deleted the sample image from the template, it erases the clipping mask function as well. In that case, you'll need to add the function back in. To do that, make sure you've added your image to the template, then go to the layers section on the right hand side. Make sure your image is above the shape in the layers section. Right click the image in the layers section and select "create a clipping mask." You'll see an arrow pointing down next to the image, indicating it will clip to whatever is in the layer below it.
You're able to move the image around within the shape by clicking and holding while dragging it. If you need to move the shape, highlight the shape and image together and then move it around until it's in the desired location.
At any time, feel free to save your work by clicking the "save" button in the top left corner.