Hi clavaud,
The mentioned feature has passed testing and I've just given it another look and I seem to be able to create ring groups in v3.1.2434 (FREE). Maybe you are experiencing a unique issue but can you please specify exactly what is going on ?
Are you using a foreign language?
Are you reaching the ring groups page at all ?
Is there something particualr missing in the ring groups page ?
or perhaps are you able to create the ring group but it doesn't work ?
Please bear with us and spell out the issue as clearly as possible so we can confirm that all is well.