I am not familiar with your particular software but here are some general thoughts.

If you receive an error with the name of the .dll you could search the drive to see if it exists. If it exists, you could try manually registering the dll. Also, if the path to the .dll is mentioned you could verify that the .dll exists in the folder mentioned.

Another thought is you may need to install the program using compatibility settings by right clicking on the installer and choosing Troubleshoot compatibility. Some of my Iwatsu software required this treatment on Windows 10.