Your future self (and your computer’s antivirus) will thank you. Have you tried installing an older version of Premiere through the Creative Cloud app? Let me know in the comments if it worked for your workflow!

Let’s untangle this mess. Here is the cold, hard fact that most people don't want to hear: Adobe Premiere Pro CC 2019 never had a "perpetual price."

Either subscribe officially and downgrade to 2019 via Creative Cloud, or switch to a truly perpetual alternative.