Check the guide and open spoiler under my notes of Solution 1, it will show you what needs to be under WoW/Data and WoW/Data/enGB folder. Freedom is grayed out because you likely have 5.4.2 version of MoP, not the upgraded 5.4.8.
To upgrade it, you need to replace the WoW.exe with the one from the archive and you also need to put in the missing .MPQs in WoW/Data and WoW/Data/enGB. Ideally, if you copy Data/ folder from the archive to your WoW directory, it should automatically place in the missing .MPQ files for the upgrade.
To upgrade it, you need to replace the WoW.exe with the one from the archive and you also need to put in the missing .MPQs in WoW/Data and WoW/Data/enGB. Ideally, if you copy Data/ folder from the archive to your WoW directory, it should automatically place in the missing .MPQ files for the upgrade.