update has shut down my adobe apps on old machine.

Please remember that OS X 10.11 is WAY WAY out of date and not getting security updates from Apple. I don't advise using it online at all.

Might be safest to you use your full system backups to go back before this happened, though there is a risk it can leave licensing permanently broken. You've been on borrowed time, really.

First, turn automatic updates OFF in the program manager

Adobe now offers the current and ONE older version via the online program manager
.
I do not know how far back this process will go, but try this link
-NOTE that you will have to search the site for your specific download
Direct Download Links https://prodesigntools.com/tag/ddl MAY help
-you MUST do what it says in Note: Very Important Instructions
-https://prodesigntools.com/adobe-cc-2015-direct-download-links.html#download-instructions
-the prodesign links go directly to Adobe's file server, so this process will
--only work until Adobe completely removes the old version(s) from the server
.
IF/When you do have a download, be sure to copy it to AT LEAST one external device
-since Adobe does sometimes remove old versions from the server
-a usb flash drive or external hard drive, or write to a DVD