it has happened to me a few ties in the past that for some mysterious reasons, a workflow suddenly appears as a workgroup and all the nodes within are folders too. This has happened again just now on a dataset with 2.3 million lines and 1000-4000 columns that takes approximately 4 days to run to completion. I am submitting an article about the analysis and when I wanted to upload the workflow I saw it had morphed into folders and is not recognised anymore as a workflow. I see that a workflow.knime file is missing. This appears to be a xml file describing the workflow. Is there any way to recreate that file based on all the folders? I desperately need to restore this workflow as it was before. Thank you.