Quality Problems automatic repair PE 10

Hey.

I've got a problem.

When I started to work on a project, I accidently accepted, that Premiere "repaired" the quality problems in the clips that I imported to the project.

That's a long time ago. But now that i rendered the project because I finally finished it, you can see quality issues.

And these issues were not there, before PE "repaired" the clips.

So my question is: does anyone know, how I can "reimport" the clips to the project and deny the repair?
Or is there another way to undo the work by PE?

Thanks a lot,

Leopold