Substance License

I have a Perpetual Indie License for the Allogoritmic Substance Suite. Once Substance moved to Adobe I tried these versions, nowing I could go back to the old version once my year subscribtion ended. This because the Adobe versions are way to expensive. Now I removed the Adobe versions and reinstalled the Allegoritmic versions, but although I have a Perpetual license, it states that my license is not valid. So, what is wrong with this Perpetual (=never ending or changing) license?