He tried the usual quick fixes. He re-downloaded the latest version of the software from the vendor’s website. He hit "Repair." Nothing. The error persisted.

C:\Windows\SysWOW64\regsvr32.exe "PATH_TO_DLL\ChilkatAx-9.5.0-win32.dll"

To use this DLL, it must be recognized by the Windows Registry or your development environment. 1. Standard Registration