Norton Security Suite not updated to current version

Norton announced the release of Norton Security version 22.1.09 back in December to resolve a problem with slow computer shutdowns.  I'm having this problem, but the version on my Windows 7 PC is only 21.6.0.32 despite running live update on a daily basis.  I get Norton Security Suite via my Comcast XFINITY account.

Here's the link to the announcement:  https://community.norton.com/en/blogs/product-update-announcements/norton-security-norton-security-backup-221-update-available

How can I get the Norton update that is actually the most recent?