Unfortunately, at this time Pro-Codec and Codec Toolbox are not compatible with FL Studio.
You can still use the standalone desktop app that is included with the installation, but using the plug-ins within FL Studio will result in unexpected behaviour that will render them unusable.
- Oxford Fraunhofer Pro-Codec v3.01
- Sonnox Codec Toolbox v1.1.0
If you have purchased either of these plug-ins for use in FL Studio, please get in touch with support to request a refund.