Antivirus Installation for Mac OS Version 10.11.6

I do have a paid version of Trend Micro Antivirus which expires on June 11/2022. I was using it without any problem until recently a notification pops up saying a need for upgrading to the new version. To do so i had to uninstall the old version, which i did, and start installing a new version. But the problem i am having is, it keeps on telling me i can't download with Mac version 10.11. It says i need Mac OS version 10.12 or above.

What do i do with this?