I'm using the latest version 2.0 Alpha 8.5, and it's a very reliable program. Check out the options on the horizontal menu for wind settings. You'll want to fly eventually with some 5-10 mph winds, since this seems to be the case for most flying sites.

I do have some bad news for you. I too ordered a serial PIC interface from Mile High Wings (for a VG400), and it didn't work. On top of that, they refused to support it and cheerlessly refunded my money leaving me out the postage.

After some research, I decided against Tx interfaces. I have come up with two reliable solutions. See my posts on FMS.

Ciao,

Eagle Al