Is rsammcsetup-18.104.22.168.0 the correct download to upgrade from 8.1 to 8.1?
As Edward Davis wrote, you will need the rsa-am-update-22.214.171.124.0.zip to go from 8.1 to 8.2. To get the file, follow the steps in the article on 000034558 - How to download RSA Authentication Manager 8.x full kits from RSA Link.
You will also want the RSA Authentication Manager 8.2 Setup and Configuration Guide for information on installing 8.2 as a fresh install as well has how to upgrade from 8.1 to 8.2.
After upgrading the primary and replica(s) to 8.2, be sure to also install the most recent patch (primary first then replicas). The most current is RSA Authentication Manager 8.2 Patch 4 Download.
If you have web tiers in your deployment, please be sure to also download the rsa-am-extras-126.96.36.199.0.zip and follow the steps on how to Update the Web-Tier.
Anything with 'MMC' is about installing a plugin into a domain controller for managing users and tokens
on the domain controller itself.
You want rsa-am-update-188.8.131.52.0.zip ,
which contains the iso file to upgrade from 8.1 sp1 patch XX to 8.2
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