aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

I don't even think there was update news about it.

aint removing this since its bound to break again sometime in the future

https://steamhost.cn/news/19274/

Basically, whatever happened in this update, something wasn't done to make the Workshop Uploader up to speed with the patches made.

So, lucky for us, I recently upgraded my PC and on my old PC I have the older version of Left 4 Dead 2 before this update was made.

Therefore, I excluded the needed files and packed them up to make a standalone Workshop Uploader.

{LINK REMOVED}https://www.mediafire.com/?iikjob8ygrwk8w8

It goes into your "SteamApps/Common folder", do not overwrite your Left 4 Dead 2 files.

Option 1:
Boot "l4d2_workshop_manager.exe" from "..\steamapps\common\Left 4 Dead 2 Workshop Uploader\bin" and use it like that.

Option 2:
Add as a non-Steam game, for easy access

There was another option that had you edit "MediaList.TXT" to make Authoring Tools read this .EXE instead of the one in the Left 4 Dead 2 folder, but I can't seem to get it working (maybe Valve updated the SDKLauncher code to make it so you can't load third party apps through it?)

Disclaimers:
Valve will probably fix the uploader someday, maybe not, it's Valve we're talking about here.

For whatever reason the Uploader won't read your previous addons... it's odd.

hire me Valve