Oh yes, you're right that's why I couldn't add it again (didn't realise you couldn't have more than one instance). It doesn't seem to work correctly though. Open URL no longer works. I managed to download the project as a folder and edit it to say it was r249 and open it in r249 and it seems to be working ok there. Will keep testing things out both in r250 and r249. Launching something tomorrow and have def learned my lesson about using beta versions!