Progress Lost After Purchasing Ultimate Collection Upgrade

Hi Guys,

Recently just bought the ultimate add-on to the game, however, all my progress (in-game cars, activities achievements, tags/samples etc.) has all vanished. I have tried to look back to the save game folder but the files have been edited at the moment I turn on the game after I purchased the add-on. The only stuff that's left is my level on multiplayer. Is there any way to recover all my previous progress. Thanks