Yea I tried using the spoiler tag function to avoid exactly that but it's not working and I can't figure out why, that's why I asked for help with it. Hopefully Rhonin or someone at Stardock will help so that I can edit and compress that post.
Spoiler doesn't compress, it just hides the text. The easiest method would be upload the file somewhere else and post a link here.
Followed this and still no joy.
Go to steamapps\common\Galactic Civilizations III\Tools and run EverythingButCampaignData.bat
If that doesn't work manually delete the folders data and DLC from steamapps\common\Galactic Civilizations III and then validate files.
If that fails as well follow the steps for the Purge here and reinstall. Make sure to backup and ship designs and civs you created that you don't want to lose.