I've done the control panel portion of add/remove programs, which completed successfully. The NetFlow web resources (views, tabs ...) and the database tables is still there, just the status of Netflow collector is down.
How to remove NTA 2.2.1 from Orion 8.5.1 SP3 completely?
See this thread for steps-in particular the last post...
http://thwack.com/forums/p/8709/37972.aspx#37972
Thanks, Mark. I didn't find the thread, because I was searching for "uninstall", not "remove". O:-)
The last post was helpful. I was thinking of manually deleting the web site files and corresponding database tables/recordes myself, but felt a little intimidated.