Garry's Mod 13 crashes when GM_Atomic reaches 100%

I’ve had this problem occuring since I tried to install GM_Atomic. Whenever the download reaches 100%, the game crashes. I’ve reinstalled Garry’s Mod 13, restarted steam, and checked if my steam version was up to date. Even after doing this, the problem still persisted.

Every time I start the game, steam workshop starts the download again. This is a problem because every time it reaches 100%, as you know by now, it crashes the game.
Is there anything I can do about this? Can I stop steam workshop downloads?

(User was banned for this post ("Wrong section" - Gran PC))