This is a Windows Installer error that indicates that another version of this product is already installed.

Hello,

We got a new PC with Windows 10. My husband installed the free trial of Coreldraw Graphics Suite 2021 for Windows. I am a student at a university, so I purchased the education package of Coreldraw Graphics Suite 2021 for Windows. Both were digital downloads. I received this error:

This is a Windows Installer error that indicates that another version of this product is already installed.

Here is a screenshot. 

I have went through and uninstalled all of the free version (or so I thought), but the purchased version is still giving me the same error. 

Please help!