Dragon Age Inquisition : DLC installed but not showing up in game

@Erzaeth 

This helps many people, but not all, so I can't guarantee it will work for you,

 Please clear your temp files:

• Press the Windows key and "R" at the same time
• Into the new window, type or copy & paste:  "%temp%"   (Without the quotes.) > hit "ENTER"
• Now your Windows Explorer should have brought you to the "C:\Users\>your user name<\AppData\Local\Temp" folder. > Delete all files and folders in it.
  (If some files or folders can't be deleted, reboot and try again.)

Then:

• Make sure Origin and Steam are closed.
• Press the Windows key and "R" at the same time.
• Type or copy and paste "%ProgramData%\Electronic Arts\EA Services" (without the quotes) into the new Window > ENTER
• Move the "License" folder to your desktop.

Then:

• Go here and download "Revo Uninstaller". (The freeware version, Portable version works too.)
• Run "Revo Uninstaller" > Uninstall DAI.
• At the end of the main uninstall, Revo will ask you which cleaning method you want to use. > Select "Moderate" > Browse
• If "Remaining registration content found" is displayed > Select All > Delete > Next
• When "Remaining Data and Folders" is displayed > Select All > Delete
• Run "Revo Uninstaller" > Uninstall EA Desktop.
• At the end of the main uninstall, Revo will ask you which cleaning method you want to use. > Select "Moderate" > Browse.
• If "Remaining registration content found" is displayed > Select All > Delete > Next
• When "Remaining Data and Folders" is displayed > Select All (Make sure the "Origin Games" folder is not in the list) > Delete.
• Restart the PC > Reinstall the newest version of EA app from here.
• Reinstall DAI. > Test.