Infiltration Mode is gone?

[Din D'jarin]

So, I bought deluxe edition and unlocked infiltration mode in my Uplay account and now when I installed the game to play again only the infiltration mode does not appear but all the rest of the contents are there, I wanted to know if there is any way to reactivate this or that mode is gone forever in the pc version because on the xbox 360 it still works.

[Adeptus ⁧⁧Aconite]

Use this guide. https://steamcommunity.com/sharedfiles/filedetails/?id=2969130403