Reorder files listed in Solution Explorer from alphabetical descending to age?

Question

In Visual Studio 2012 Solution Explorer, I see a list of all my script files. On my old Visual Studio 2012 computer, the files were listed alphabetically in ascending order. However, on my new computer, the files are listed in alphabetical order. How can I switch the sort order of scripts listed in ascending order in alphabetical order?

Thanks in advance.