Whenever i try to go play online it wont connect to a server and tells me fixed file mismatch. Please help

So when I first got the game I thought it would be cool to mess with 2012 and 2013 daytona supercross with the editor. Now that im smart I would like those tracks to be normal again but I dont know how to get those saved changes off. PLEASE HELP ME!!! Thank you

If its Motoland in Indiana (which it looks like it is) its one bad a** track in real life and will be awesome in mx sim. It already looks like an awesome track from the pics

Name: Marsh
Number: 12
Link: http://www.mxszone.com/2014-alias-a1-psd
Colors: OrangeWhite RedWhite
Text: What ever looks best

Thank you and black lettering please