This plugin can not be used on its own like all other plugins. When trying to insert a recipe on a post, you are forced to signup to use it (and be connected each time you want to add a recipe).
If people want to leave a review of your recipe ON YOUR SITE they are forced to join yumprint website too.
Make it clear in the description and the installation that forced signup is required.
Plugin deleted. Plugins leaves files in database. Needs database cleaning afterwards.