We will use Widget Merger to merge your current template code with the latest version of template.

Just access your blog dashboard, choose Template tab, and click Edit HTML button. Copy all your current code and paste into "Your current template code" field on Widget Merger tool.

Then open the latest version of template (in your download package) with a text editor and copy all its code then paste to "Latest update template code" field on Widget Merger tool.

Finally, click Merger Widgets button and then copy all code in "Result Template Code" field and paste to Template HTML Editor on your site.