Hi Mike,
when I choose to show “Monthly Observations”, the screen shows the current month, but no data. I had a 24-hour application running on one station.
I have WWL 7.2.113, Windows 10 Enterprise v.1703, Intel Core i7-4710MQ CPU 2.50GHz, 8.00 GB RAM.
Try installing this Weather Watcher installer over top of your current version of Weather Watcher. It includes a fix that should allow the Monthly Observations window to finish loading the monthly data.