Since WordPress 4.7 Customizr theme options are not visibile in the customizer
Please check you're theme is up to date.
We released a WordPress 4.7 compatibility update on 06 December 2016.
So since Customizr v3.4.36 and Customizr-Pro 1.2.36, those themes are fully compatible with WordPress 4.7.x .
If you're running a previous theme version you should proceed to update
It's good practice to perform a backup before doing this kind of procedure, e.g. using a plugin like this
If you're a Pro user and you haven't received any update notice, please make sure your license is active for your website. Check the following resources about how to do that:
If you still cannot see the update notice you can always proceed with the manual update.