Installing Full Text Search on SQL Server 2008 R2 Express

I can't for the life of me install full text search on my SQL Server 2008 R2 instance.

Every installer I have tried shows me this (no option to add full text):

I've tried:

• SQLEXPRADV_x64_ENU.exe
• SQLEXPRWT_x64_ENU.exe
• SQLEXPR_x64_ENU.exe

Any ideas what i'm doing wrong?

The SQL Server is reporting a version of 10.52.4000.0

Thanks in advance,

Dave