The "ACDSee Ultimate has encountered a system error and will close now" error can be frustrating, but it's usually resolvable with some basic troubleshooting steps. By following the steps outlined in this article, you should be able to identify and resolve the issue. If you're still experiencing problems, it's recommended to contact ACDSee support for further assistance.
A corrupted preview file can cause ACDSee to crash the moment you open a specific folder. Clearing the cache forces the software to rebuild these previews from scratch. Close ACDSee completely. Press Windows Key + R to open the Run dialog box. Type %appdata% and press . The "ACDSee Ultimate has encountered a system error