Your database settings should transfer over if you are doing an upgrade.
I would recommend switching over to a responsive template design so that you comply with google's mobile friendly rules. The Westminster New, Winchester Black, Winchester Responsive, and Responsive Sheffield Blue v2.0 are my most recently updated and advanced resopnsive template packages. They can be all be used as a 1, 2, or 3 column layout, with or without the left/righ columns on the home page.
Thanks,
Anne
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