Just found this and it worked:
https://support.apple.com/en-us/102445
If you want to open an app that hasn’t been notarized or is from an unidentified developer
Running software that hasn’t been signed and notarized might expose your computer and personal information to malware that can harm your Mac or compromise your privacy.
If you’re certain that an app that you want to open is from a trustworthy source and hasn’t been tampered with, you might be able to temporarily override your Mac security settings to open it.
After you've tried to open the app, follow these steps:
Open System Settings.
Click Privacy & Security, scroll down, and click the Open Anyway button to confirm your intent to open or install the app.
In System Settings, choose to open an app despite the security warning if you're certain the app is from a trustworthy source.
The warning prompt reappears and, if you're absolutely sure that you want to open the app anyway, you can click Open.
The app is now saved as an exception to your security settings, and you can open it in the future by double-clicking it, just as you can any authorized app.
Change the app security settings on your Mac
In System Settings, click Privacy & Security. Then scroll down to Security.
Under "Allow apps downloaded from," select an option:*
App Store: Allow only apps that have been downloaded from the App Store
App Store and identified developers: Allow apps that have been downloaded from the App Store and from developers identified by Apple.