I have used the terrible version 5.0.2 for around a year. When I upgraded from OS 10.4.2 to 10.4.3 it finally became totally "disfunctional" I could download data from my Vantage Pro wireless station but virtually nothing else. Even the red "close" boxes stopped working.
I am now testing 5.0.3 and its basic features seem to work. However, I have to agree with all the other people here who criticize this software. It is terrible and non-Mac intuitive.
I would be prepared to pay good money for a true Mac application that could download the station data in a spreadsheet format, make decent quality graphs and upload selected current and historical data items to my website. If there is anyone out there that is in the same situation, can you post here and let's see if someone will take up the challenge. There have been around 260 downloads of this version in a month and, I would suspect, 260 dissatisfied users.
Tony