How do I Redo Pre-Processing?

Delete the ppk.txt file from your [ins] folder.

Delete the ppk.txt file from your ins folder.

The trajectory file is all that you need to remove to allow your trajectory to be redone using the trigger file ppk.pcmp contained in your dataset.  Your selections will be carried over, and the ppk.txt will be recreated once you "produce LAS" or "Save Project".