After you get the program installed or reinstalled the first thing to do before you open your tax return is to update the program and install any state programs you had. Then open your file. So you first might need to start a fake return to be able to download the state program (go to FILE - NEW). Enter some basic information, then go to the state tab and download the state program. Then try to open your existing return, go to FILE - OPEN
BUT.......
You can't install or reinstall or update 2019 anymore. They only support the last 3 years and recently took off 2019 when they moved 2022 to the past year section. And 2019 was the first year they started using the License Code to activate the program so it has to log into Turbo Tax. You can't activate it now. It will fail.
Some people at the end of this thread found how to bypass the activation for 2019
https://ttlc.intuit.com/community/taxes/discussion/re-there-was-an-error-with-validating-your-license-code-please-try-again-error-code-630/01/3123118#M1145047