You can also delete entire folder from registry which is responsible for version 1.75:
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Stardock Start10
Do not make a mistake and do not delete this folder responsible for version 1.8:
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Stardock Start10™