Make a full site backup before updating theme.
To update your theme to new version just add new and replace changed files.
Added - Twitter API 1.1 support
catalog/view/theme/perfectum/js/twitter/*.*
catalog/view/theme/perfectum/template/common/header.tpl
catalog/view/theme/perfectum/template/common/footer.tpl
catalog/view/theme/perfectum/stylesheet/stylesheet.css
Fixed - Facebook block display fix
catalog/view/theme/perfectum/template/common/footer.tpl
Fixed - Site display bugs on mobile devices with Responsive turned Off
catalog/view/theme/perfectum/stylesheet/responsive.css
catalog/view/theme/perfectum/stylesheet/stylesheet.css
Fixed - Admin panel colors save bug
admin/view/template/module/perfectum.tpl
admin/controller/module/perfectum.php
Fixed - Responsive style fixes for hover event
catalog/view/theme/perfectum/stylesheet/responsive.css
Initial release