How do you fix a broken, but still working, MyCareer file?

You see, I was trying to make the Celtics alternate jerseys the default away jerseys using Leftos's Roster Editor, but it didn't. Instead, the Retro Home jerseys showed up. I tried to change it back but the original art was gone, it only shows a white, blank jersey whenever my team played on the road. I wanted to try to fix it using the Reditor, but I found out you have to pay for it. That's why I used Leftos's Roster Editor instead. Please help. Thanks!

I have tutorials on Jerseys with that tool in my tutorial thread
viewtopic.php?f=150&t=89054
it covers how to switch uniforms as such