> I am already doing fine financially...

> And to be clear, I do know how to manage the business aspects too, so it's not like without a business co-founder I would be lost.

I'm curious: why are you wasting time worrying about co-founder issues? In your apparent case, a co-founder is a solution to a problem that you don't have.

If you're truly capable of financing the launch of a business, developing quality commercial software and successfully getting it to market (read: selling), you can keep 100% ownership of your company and call all the shots.

Since that's an ideal scenario, I suspect there's more to the story. For example, many capable entrepreneurs are afraid to start a business on their own, and a co-founder is simply a crutch to address this irrational fear.