This file only changes the shields found in the original game.
If you have any of the DLCs you should also Download the patches for them.
Or if you have both DLCs then you can download Bigger Shields Legendary Edition instead.

Install this one if you have the Dawnguard DLC

Install this one if you have the Dragonborn DLC

You can Install this one if you have both the Dawnguard DLC and the Dragonborn DLC.
Do not install Bigger Shields, Bigger Shields Dawnguard Patch or Bigger Shields Dragonborn Patch if you install this one.