I don’t think that is possible. To reset a workflow KNIME would have to run in order to know what ZIP files have to be removed or to be replaced with empty files. Only think I could think of would be some strange combination: call a workflow that has a switch where it would end when it is called to be backed up, have a reset, then save the workflow and initiate a ZIP backup. All while KNIME is running. That is maybe not the most elegant idea and a traditional backup or via DropBox would be better.
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