ExanctFlat Help, Flattened mesh gone

Hi i have a question for the developers of ExactFlat. Ive been using it for awhile but only noticed recently that after I’ve flatten, sprung, and traced what I’m working on. Sometimes I need to go back and trace something else that I’ve forgotten and my flattened object is gone but the traced shaped and match marks still remain. So id then have to sweep everything and start flatttening and springing everything all over again. Is there some option i may have turned off or on or is this just an error.