The option to keep Panels created in Panel Editor format ends with CANoe/CANalyzer 13.0.
When a CANoe configuration is opened with a recent CANoe version, panels in CNP format (from Panel Editor) are automatically converted and saved in the Panel Designer XVP file format (“EXtended Vector Panels”). The automatic conversion allows to edit all Panels in Panel Designer.
With OEM packages it may happen that panels are not automatically converted. In that case repeat the model generation with the Model Generation Wizard which will create “new” XVP panels.