Make sure you are using the right version.
For older versions, add to the url "/1" for SSD or "/6" for PCP.
Windows: https://static.pokercopilot.com/pokercopilot_windows_8_10_build_9940.exe
macOS: https://static.pokercopilot.com/pokercopilot_macos_8_10_build_9940.dmg