
Hi Joachim,
When you select Share->update shared view, the link remains the same, so any previous links you gave out will point to the updated document.
To stop sharing return to the share dialog by selecting Share->Get link to shared view, and click the “Stop sharing” link.
As for sharing with just a select group, we don’t have a way to do that with our sharing system. However, if you save the document to google drive and then share it via Google’s sharing mechanism you could control who has access. A note of caution though, if you share this way, everyone has access to the original document so issues may occur if more than one person opens it as the same time. Using the built in sharing mechanism for CODAP causes each person to get their own copy of the shared view.
-Dan Damelin