I have been editing a flow (some shown below) on the the new designer for the last few weeks, and today when logging in, the flow was shown in the old designer and the 'new designer' button is greyed out. There is no functionality within the flow which is not available on the new designer (as I saw reference on another support post) as I have been editing it in the new designer for some time now. Any help would be appreciated as I much prefer using the new designer.

