If you can't edit any collections in the Raw tab in SaveEdit, you probably
don't have the full .NET Framework 4 installed, but have the Client Profile
installed.

To fix this, install the full .NET Framework 4.

http://www.microsoft.com/download/en/details.aspx?id=17851

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Russian localization courtesy of adamas_koff, adeqwat, AgronomNN, 
AleksanderGaMeR, altEF_4, ghostikmen, Haoose, JlieNe, Kane0032, leemur, 
nekkit333, sokolzx, and Teleproter.