Kendra Little has a video showing how to use plan guides:
If you need to add, remove, or replace hints from ad-hoc queries where you can’t change the code, plan guides can help. See a demo of removing a query hint from parameterized TSQL run from an application, and get tips on how to make your plan guides work in SQL Server.
The code from the demo is here. Links for more info are below the video. Have fun!
Click through to watch the video, or you can catch the podcast version.