Hi Brian
For your interest.
I too have the same problem with no rain for the year showing on main screen. My Rain To Date graph showed 0.4 (for rain that fell on 3 Jan) but did not include rain that fell on 24 and 25 Jan.
Corrected Jan months rain and adjusted yearly rain total in Offsets, Limits and Rain Totals but still showing zero rainfall for year on main screen.
Davis Vantage Pro 2. V10.37S89 on Windows XP.
Cheers
Allan