Where can you find the Customizr themes changelog ?
Customizr (free) changelog
In the readme.txt file of the theme
The theme includes a readme.txt file in the root folder where you’ll find an history of all changes until the current version.
You’ll find the latest changelog on our Github page.
On WordPress.org, you’ll find a development log of the theme.
Note : you can download any previous versions of the Customizr theme from the WordPress themes repository. Simply use the following type of download link : https://downloads.wordpress.org/theme/customizr.3.3.23.zip. If you need the version 3.2.11 for example, you’ll be able to download it from : https://downloads.wordpress.org/theme/customizr.3.2.11.zip.
Customizr Pro changelog
The Customizr Pro changelog is available here.