Having issues (similar to XCalibur on May 3rd). I purchased WeatherFlow from the store. When I go to install it, the installation flow never gets me to a place where I can pick a slot and install. I've tried rebooting twice, which seemed to fix things in the other thread, without any success.
Here's what the flow looks like for me:
I select (Re)install, that brings up the following:
When I select update, I simply get a "Cancel" button in the UI.