You could support them for a month on patreon or buy the game on Steam if you want to send more money their way.
But I shouldn't have to go that way. But thanks, I did think of that. Buying it on Seam is a better idea, and I may do that, but I know what % steam keeps, I am hoping Itch keeps less, hence my request. If Book III is available on Itch, I could pay extra for that, but I presume that will be quite a while...