Hi,
Thank you for posting your query in Microsoft Community.
A quick question before we proceed.
What do you exactly mean by configure excel 2016 so that Xls 3.37 works?
Provide more information related to the issue for better assistance.
Meanwhile refer the thread given below to know more about Excel 2016.
http://answers.microsoft.com/en-us/office/forum/office_2016-excel/excel-2016-one-instance/7d4c3391-df2c-43ae-9c98-b23a18f52b53
I look forward to your reply to assist you further. Thank you.
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Have you contacted Vector Economics?
There's a Contact Us link at the bottom of their web page
http://www.xlsim.org/xlsim/index.html