As you found out. You problem was an invalid entry in the database file. Did you edit both database files? Be very careful when you edit them. If it isn't done proberly. You will ruin the databast file(s) when you save it.
Actually, the database edit didn't relieve the problem. Upgrading to v14 from v13 made the difference. My database is screwed. The Precip data isn't showing. Funny thing, if I click on "Rainfall" in the menu, the data is there, but it doesn't show on the main panel.
This is quite the goofy system for maintaining data.
I run a scheduled backup on all of the VWS folders twice a day, just in case this happens to me. But then I have a dedicated Weather Station computer.