1) Go to uplay and turn off cloud sync
2) Download the Save Editor (ACSaveTool) [2.1.1]
3) The editor is suitable for transferring saves: from license to license, from pirated to license and from license to pirated version.
Click Open and select the save that we want to convert. You can select everything at once.
Game pop-up menu, select Assassin's Creed 3.
In the DencryptionID line, write my uplay ID (My uplay ID: 72db4701-7368-4eef-ac17-7a6baace478d).
In the line EncryptionID write your uplay ID
After conversion, a file with * .bak resolution will appear
Next, copy the original save file and the file with the * .bak extension along the path C: \ Program Files (x86) \ Ubisoft \ Ubisoft Game Launcher \ savegames \ YOUR ID \ 5183
(the name of the folder with letters and numbers is UplayID).
4) Go into the game, start from my save game and then exit the game (save for any chance)
5) Turn on sync and close uplay
6) Turn on uplay, and click play. After that, a window will appear in it, select "DOWNLOAD SAVINGS FROM COMPUTER" select this item!
All uplay rewards are unlocked.
Save is made on the license uplay.
My uplay ID: 72db4701-7368-4eef-ac17-7a6baace478d