Is there a way to make modded SMAPI and vanilla use different save folders?

I followed the instructions to load SMAPI as a non-Steam game and it works beautifully. The only issue is that now I have a half-dozen vanilla saves showing up in my modded launch, and my modded save showing up in vanilla, and I have had to restart several times now because I’ve selected the wrong farm.

So - is there a way to make the different versions point at different save files?