Windows Security recently blocked an app? Here's how to allow it again.

[Windows Central]

You can now allow apps that were blocked by Windows 10's ransomware protection using this new option on version 1809.
On Windows Security (formerly known as Windows Defender Security Center), Controlled folder access is a feature designed to protect your data against ransomware and other dangerous malware.
When enabled, the anti-malware feature monitors the changes that apps make to your documents, and if suspicious behavior is detected, the app gets blocked automatically. The only caveat is that it's not perfect, and it's possible for Controlled folder access to block a trusted application.

Full story from the WindowsCentral blog...