Dear Owen, and all,
Thanks Owen for the lead regarding the workspace directory import - which indeed doesn't seem to change the state of the project.
I'll try to elaborate a little:
Last Thursday, by 13:00/1PM, I still had a copy of the VIAF_ID column fully reconciled with Wikidata (a large part of it was matched, but not all) and many more thousands of values in columns split 1 and split 2 reconciled with data. Also, the recent history in the "undo" was from the morning and the night and day before.
Something happened on Thursday afternoon and in the evening, the project suddenly lost the VIAF reconciled column and most of the reconciliation on the other columns. the "undo" panel showed actions that I did back in June.
When I look at the workspace directory, I see files in the history folder of the project through Thursday, before and after this change, but after copying the project folder, removing history files from Thursday afternoon and reopening Open Refine, nothing changes and I still get the old state from June. Is there something in the data/json files of the project folder that I should change?
many thanks,