There is a major bug that may cause a lot of problem ..just imagine you move a file using teracopy and undo the action ( using Ctrl+Z or Right click in Windows Explorer and choose Undo ) , Windows explorer totally wipes your moved files instead of returning those back to original place .. it is happening because teracopy failes to update the undo history of explorer , so explorer's undo doesn't undo the teracopy action ..

DON'T USE UNDO while using teracopy as file handler otherwise you will loss your files