As you are probably aware, CDN Sync Tool has been very broken for a while and actually unusable since the WordPress 3.3 update.
I have now released version 2.0 of the plugin which has been completely rewritten from the ground up to work better and faster. It is now also fully compatible with WP 3.3.x upwards. There are a couple of features that have been excluded from this version because a lot more work is required on them.
Before updating you have to be aware that your CST settings will not be preserved through this update and will have to be reentered.
There will likely still be bugs in this release so if there is anything you come across then please use the email form in the plugin help tab or send an email to our support team at firstname.lastname@example.org.
You can download the latest version from the WordPress plugin directory or update through the WordPress built in plugin updater.
Thank you for your continued patience while this work was being carried out.