Try this first
Your Tulip 1.0 key works in Tulip 2, at no cost
On a Mac where Tulip 1.0 was activated, Tulip 2 finds the saved key the first time it opens and offers Upgrade for free: Pro on 3 Macs. macOS may ask you to allow that. On another Mac, paste the key from your Tulip 1.0 purchase email in Settings › License.