You have installed edge reflow right, I ask because I have and it's there. Not knowing anything about your environment it's hard to say. The screenshot says your on a mac, more than that I'd just have to guess.
Yes I have Mac and yes I installed Reflow.. Also I uninstall all photoshop and reinstall again and still seeing same problem.
3.4GHz Quad-core Intel Core i7,
NVIDIA GeForce GTX 680MX 2GB GDDR5
I am having the same issue. I also get the following message everytime I start PS:
There is a problem with Generator. Please quit Photoshop and try again. If the problem persists, remove any third-party plug-ins or try reinstalling Photoshop.
I have tried uninstalling both PS and Reflow and reinstalling them in different orders. Makes no difference. Also tried just downloading/installing the reflow plugin.
I found a solutions. Before the open Photoshop you must to open first Reflow then open Photoshop. Vola "Edge Reflow Project" coming Generate menu. If you dont open first Reflow doesnt show this features..
Tried this, but it did not work for me.