Make a theme backup before updating theme.
To update your theme to new version just add new and replace changed files.
Fixed FATAL ERRORs due to newline character missing issue in illusion/index.php, illusion/content.php, illusion/swpf/widgets/swpf-dribbble-widget.php, illusion/swpf/widgets/swpf-flickr-widget.php files.
Fixed accept cookie top bar overlap issue on top menu area illusion/functions.php file.
We have updated and added some rules illusion/style.css file due to gravity form field styles, top menu multilevel.