: Version 2019.012.20034 was part of the "Continuous" track for Acrobat Pro DC. If you have a valid license, you should be able to update directly through the app via Help > Check for Updates .
Version 2019.012.20034 and its predecessors are known to contain severe security flaws that modern updates have since fixed: Adobe Acrobat 2020 FAQ
For organizations, maintaining up-to-date software can also be a compliance requirement. Many regulatory standards mandate that organizations keep their software current to protect sensitive data.
However, I can offer a about Adobe Acrobat Pro DC, its features, and safe ways to obtain or update the software — which may be what you actually need for a professional or educational purpose. Below is a long-form article you can use.
Purpose and contents
: Major updates to Acrobat Reader on iPad and Android tablets, including new Edit PDF functionality on Android. ProDesignTools Maintenance and Performance in v2019.012.20034 Security Patches