3.4.9 is out and plays nice with everything through Big Sur (Big Sur is starting to get a little twitchy, though). Yes, I planned that far ahead. v4 beta will actually be here real real soon (I'm hoping January, or Q1 at the worst) (updated 01/01/2021). More info is here! Debtinator 3.4.9 is out! Only $19.99!
What a great little program. It is exactly what I have been looking for. All you do is type in everything from your income, your monthly expenses, and your debts and bam! The hardest part is being honest with yourself. Very useful!