Thanks for contacting us. There are 2 main ways to “erase” from an image:
1. To paint a flat color (e.g. white) over your image, you can use the Effects tab > Doodle tool (towards the end of the page). If using this method, you can optionally “pick” a color from your image by first clicking the color selector and then your image.
2. Alternatively, to delete from a second image that has been dragged on from the Photo Basket (at the bottom of the editor) you can use the Eraser tool (which appears when clicking on that dragged on image).
Does that help or do you still have the problem?