Cannot get Painter Essentials 7 to install on either Mac Mojave (10.14.6) or Win10

Hi,

This morning I purchase and downloaded Painter Essentials 7 for both Mac and Windows. Neither installs.

The Mac opens the installer, runs through the preamble, but at the start of the actual install stage fails a few seconds in with the message "the installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance"

The Windows installation is even less helpful - it downloads the 700MB file and then just vanishes entirely - no messages, nothing at all. However, the installer log file says the zip expansion failed.

Corel online chat support provided nothing of value.

Help? Has anyone sucessfully got this program running on either platform?