Undo Direct Processing

Hello,

I must say, now that it works, the new direct processing is really sweet. Well done Steinberg. I am going to increasingly use that for mixing.

I am just a bit worries. In previous versions, somehow, I often lost the ability to undo the direct processing. I suppose that is due to me somehow losing the previous version wav files. Is there any way that the direct processing files can get lost in Nuendo 8, by for example cleaning up the Pool or backing up the project wrongly?