It looks like a file included in the install was corrupt. We’ve updated the x64 installer with the correct file.
You can download the updated “log4cxx.dll” file from http://www.cerberusftp.com/files/log4cxx.dll and replace the one at “C:Program FilesCerberus LLCCerberus FTP Serverlog4cxx.dll” with the new one. It should allow running Cerberus, as well as uninstall.
NOTE: This is only for the x64 install. We’ve updated the installer so this is no longer necessary with current downloads.