Ian
I had a nightmare with the last update a month or two back, and ended up letting "nature take its course" and then simply did a search for all navdata files on my laptop, to find where the so and so had downloaded to!!
Then as Alan suggested, did a straight copy and paste to the data folder where AirNav was loaded - this was on Vista also,works a treat now, so suppose the moral is ignore what it says on the tin
I had problems in initially loosing mylog data and all my existing pictures also, but all happily restored now.
I hope this software issue doesn't deter too many users from accessing the new file, and especially the fantastic effort the team have put in, continually improving things week by week, but agree that a straightforward fix would be most appropriate
Have a great Easter all - let's hope the weather holds
Rich