Is there any way to individually edit the list of structural changes applied to the data file? For example, I created some calculated fields in Omniscope. Then I deleted those and added them to the data file instead. But now when I re-import the data, it deletes the fields because deleting the fields is in the list of structural changes I applied. I'd like to remove individual structural changes from the list so I can keep some and get rid of some. Is that possible?