I feel this is a real dumb question... but...

I have been using the EM (and as the 7.1 docs says it is not going to be supported in the future) and working on setting up the BRM (Backup and Recovery Manger).

However.. looking at the doc to install Avamar Adaptor.. it says

In the Avamar Installation Manager. Select the Backup & Recovery Manager tab

.... so now that I have crawled out from under the rock...

What and where is this Installation Manager that I have never seen?