Seems I some day removed Codesite, but Delphi XE4 continues to try load it and therefore halts during startup
If you look in the registry under
HKCU\Software\Embarcadero\BDS\11.0\Experts
you should find entries including
Beyond Compare IDE Package
and
CodeSiteRADStudioTools
Delete the CodeSite one (after backing up your registry of course) and the IDE will no longer attempt to use it.