I have my system running on an assumption of every flight being flown at 3000ft. As a consequence, I presume, the winds aloft are also for 3000ft.

Now I'm struggling to find the right button(s) to press and set it at 1000ft.

Somebody please remind this numpty

SD and a cheap Chinese satnav = Jobzagoodun.

By default it'll reflect whatever you've set as the cruise altitude for your flight.

Ok, beginning to make sense of it.

I set up a route and then open the virtual radar and change cruise levels to my requirements and 'save'

Then the winds aloft are given for my selected altitude enroute.

What I'm wondering is whether the initial 3000ft is a system default or, something I've set up in the dim and distant past? If it's me, I'd like to set the default at 2000ft.

SD and a cheap Chinese satnav = Jobzagoodun.