Yes, you are welcome to download routes as images using the DOWNLOAD option, which uses open source maps that can be freely distributed. We would appreciate any form of accreditation.
For further details see our How-To Guide on downloading an image of a route map.
We have a number of detailed guides giving instructions on how to use many of the features of plotaroute.com.
We have a number of video tutorials demonstrating how to use key features on the site.
Take at look at our Forums for more help and advice.