You can find your save folder by default here:
Uplay: C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\savegames\<account_id> \1771
Steam: C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\savegames\<account_id> \3559
• Next, disable cloud function in Uplay. Please see our dedicated FAQ on how to do this
• Once you have backed up your save folder and disabled cloud sync, please launch and then quit the game
• You can now enable cloud again. Next time you launch the game it should no longer show the New Campaign option.
If you still don’t see the option to continue your campaign, please try the following:
Go to the save folder and rename 1.save to 1.saveold and then rename 2.save to 1.save
If the issue still persists, do not hesitate to contact us.