To install PCCharge Pro 4.3, run setup.exe found in the root directory
  of the CD.  You can also accomplish this by running the setup1.exe in
  the PC-v4 directory on the CD.

To install PCCharge Express 4.3, run setup.exe found in the root directory
  of the CD.  You can also accomplish this by running the setup1.exe in
  the WC-v4 directory on the CD.