Originally Posted by
asph3ll
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Go to your ubisoft folder, under savegames use the last edited timestamp to figure out which folder is AC unity (mine is 720, no idea if it's universal) and then move that to another location.
When you start AC unity next, it wont find any savegame, and you can start over. If you ever feel like using your old save again, simply move the new save you made, and put back the old one.
Directory should be something like:
Your default install folder (C/Program Files/etc) > Ubisoft game launcher > Savegames > Gibberish string of letters and numbers > 720 (or whatever your last edited folder is if ACU is your last played game.)