Dorchester 32 bit Install Problem

I installed the 64 bit version with the Command Center and there were no apparent problems. But, the 32 bit version, as you know, has to be installed manually from the Sonar update exe file in the ProgramData folder, and that's where I ran into trouble.  I opened the file as Administrator and somewhat into the install I received the following prompt:
 
                    "An error occurred while trying to replace the existing file."
                         "Delete File Failed: code 5"
 
The first file to trigger the prompt was:
                    "C:\Program Files[x86]\Cakewalk\Sonar Platinum\DShowProx"
        
The prompt gave me the choice to abort, or skip "[not recommended]".  So, I aborted the install.  I removed the offending file and placed it on my desktop.  Then I reattempted to install.  I repeated that process with several prompted files in the following order:
                      "C:\Program Files[x86]\Cakewalk\Sonar Platinum\Stretch.ax
                       "C:\Program Files[x86]\Cakewalk\Shared Plugins\Dewire.dll
                        "C:\Program Files[x86]\Cakewalk\Shared Utilities\NullProxy
The next prompted file was a Sonitus dll.   What is happening here and how can I fix it? Thanks.