can't switch Met: Location and Met: Game to BW from BW2

[MancunianHomesickEspeon]

Hey, rookie pokegen user here and I apologise in advance if the answer is somewhere obvious - I've done a search and haven't had much luck. Most of the words and combinations of phrases I can think of to try and explain my problem to a search engine result in hits for other things.

The problem I'm having is what I think is resulting in me being unable to use my pokemon on wifi.

I'm using pokegen 3.1.10 and trying to generate codes for Black.

In the Options > Target Game menu I can select Pokemon Black, but in the Met tab I can't switch the Game dropdown list to anything other than BW2. There isn't an option for BW. Is this because I've got a version of Pokegen that's only compatible with BW2 or is this not an issue at all? I could easily be doing something else wrong.

Upon further investigation perhaps it would make more sense for me to use pokegen 3.0b24 rather than 3.1.10?

Thanks for your help!

Edit: changed thread title to reflect the problem more accurately.

[Kaphotics]

met locations are shared between the two games, B2W2 has extra ones.