I didn't think there was market space for yet another DAW, the market is already oversaturated.
You might have to ask on the Luna forum how to tell it to send out midi to external hardware, then check in your MiniBrute manual what midi channel it receives on and set the sending channel appropriately. It should be as simple as that. If you were using Logic Pro I could help, if you were using Ableton there's a thousand Windows & Mac Ableton users here who know it inside out, but Luna I'd never even heard of. I know variety is the spice of life but I think this is one occasion where using something well-known and established is probably better for new users like yourself than something obscure which virtually no-one can help you with :-(
Hope you get it sorted.