Does it not? Hm, just tested this and indeed the last CKEditor gets all the attention.
There is a good chance that you are able to copy the widget itself and rename it to CKEditorForMendix2. To try this go to your project directory in explorer, go to the directory \widget, extract CKEditorForMendix.mpk to \widget\CKEditorForMendix2, copy paste it to \widget\CKEditorForMendix2 and start renaming it on smart places. A find-and-replace makes 32 replacements. Now make \widget\CKEditorForMendix2 a widget again and use it. This is probably the long way around to get there and not platform-supported.
Since the richtext widget is platform supported, a better advice is probably to raise a ticket at support.mendix.com or firstname.lastname@example.org