PDF Metadata Editor v3.1.1 Desktop

Once installed, this .exe installs a CLI version, normal version, and a batch metadata editor version. The batch editor needs a license key.

Software also has GitHub repo: https://github.com/zaro/pdf-metadata-editor

The license function is here, just sha1+base64 https://github.com/zaro/pdf-metadata-editor/blob/master/src/main/java/pmedit/BatchMan.java

Easy enough to just use an online generator like this https://emn178.github.io/online-tools/sha1.html Put the desired name in the input field, set output encoding to Base64, and hit Hash.