Just be mindful that there is a persistent variable that attaches to the save file itself, so an older version may not necessarily help.
The best thing I can recommend is create a save before the event, and use that to replay content until the replay option is implemented.
Failing that i can still delete all saves including the %appdata%
https://herculion.zendesk.com/hc/en-us/articles/900000233883-How-do-I-delete-my-save-files-
Hopefully this should work.