Can't open Avast due to Microsoft Windows applications not supported on OS X

[REDACTED]

I paid a lot of money for a two year subscription, now I'm getting this message:
You can’t open the application “avast_internet_security_setup_offline.exe” because Microsoft Windows applications are not supported on OS X.

I also paid for my Microsoft Windows application, so I will not be deleting that. I am a college student, and I have to have Microsoft Windows. I need help with this, do I cancel my Avast and request a refund, or is there a way to get it to work with my Windows?

Marsha

[krahulik]

Hello Marsha,
  you have downloaded an installer of Avast antivirus for Microsoft Windows. If you want to install macOS version of Avast SecureLine, the installer can be found here: https://www.avast.com/download-thank-you.php?product=SLM&locale=en-ww

Also please note that the SecureLine license is not multi-platform at this moment. If you have bought a SecureLine license for Windows and you want it to use on macOS, please contact our support to exchange the license.

Best Regards,
  Martin