Template file is located in (alter path to match your theme):
App/design/frontend/’package folder’/’package theme’/templates/smdtwitter/
Template contains these sections:
First section contains php code that loads extension settings that are assigned in administration.
Second section contains style code, there you can additionally style design of extension.
Third section contains java script code that takes care of toggle animation and remembers position of extension block.
Fourth section contains HTML code and twitter script that loads feed from twitter site.
All sections can be edited according to your needs, please be sure that you create backup of original files before editing.