Can I clarify that this thread is specifically and only about the issue that the free version of the Customizr theme was being recognised by the integration plugin, but the paid version was not.
That issue has been fixed, but, for reasons that I am currently checking, the update (to version 1.3) was never released.
Which means that in the meantime it is necessary to manually install the file described by me previously as a workaround.
If anyone commenting on this thread has an issue with the Customizr theme and the integration plugin other than recognising the Pro version of the theme could you please open a new thread describing your issue, thank you.
The integration plugin with the fix has now been published and can be updated from your plugins or downloaded from your accounts page: wp-types.com/my-account/downloads