Delete roast history

I downloaded my .json files from Roast Time 1 into RT2.
I would like to delete those files from RT2 and re-import from Profile Tool as the Profile Tool .json files have all of my comments.
How to delete roast files from RT2?
Thank you,

Hey Harlan,

You can actually reimport the same files and it will overwrite them. You may have to refresh the application to get them to show correctly though.