Re-installing the game? No need to re-install ChrisTrains products
Because of the limit of 10 installations (see here), it's worth noting that if you are re-installing the game for any reason, you do NOT need to re-install ChrisTrains products.
As long as you have not actually deleted the original game folder from your hard drive, once the game has been re-installed, ChrisTrains products will appear in the game as usual.
The only reason to re-install a ChrisTrains product is normally if you are doing a new installation on a new computer, or have for some reason deleted the game folder.