Hi Geoff
I am finding the same problem with the licence key.
I have the following plugins installed – I had a message saying that I needed to add my licence key, which I found and did, a message came up saying that the key was valid until a certain date. However when I navigate away the key is gone and I don’t get the option to update the Pro version.
I tried to follow your post but it did not work for me.
Any ideas?
The Events Calendar
Version 4.0.5
The Events Calendar PRO
Version 4.0.4
Best
Ian