Finally bulking

I'm trying to gain muscle. I have lost 80+ lbs over the past year and am ready to bulk. I just got the macrofactor app. In the goals section should I choose "gain weight"? That doesnt sound right to me. I read how MF works on the site but perhaps I am a bit slow. The app is asking me what my goal weight is but I dont want to GAIN weight (I realize gaining muscle will be gaining weight) but this option seems to be more for people who are chronically skinny and want to put on some fat or something. So I have no idea what to put for the weight goal. I'm currently 5'10" 185 lbs.