Son of davis,
I suggest you should think at least twice about things you are saying here.
The beta patch is EXPLICIT (see remark in first post from AirNav Support: "It is very important that you follow the instructions below. This beta should be used by experienced computer users only."...) for EXPERIENCED users. Not as you stated for an "inexpert of PC".
As annoying as it is that people had problems with the beta patch, it is often the pure nature of such software. A "beta version" is no mature, failsafe software.
A lot of people (including me) helped you, to get your fathers box running. After numerous, serious suggestions you finally got the box running. Your comment to this was the F-word and more language like that.
In my humble opinion this language is absolutely out of place in a forum like this.
I can't speak for other people here, but I would feel offended by your comments, especially if I gave you a lot of hints to solve your problem and get impudent comments afterwards.
I think to apologize is the least thing you should do.
Markus