Thanks for the right-click advise. Turns out I was starting from
[Places] [Search for Files] [Look in Folder | Other] and the filename
was grayed-out. A second attempt from [Places] [Documents] and browsing
to it displayed an accessible filename. I was able to change it.

Next question: I was attempting to play videos from NetFlix.com but it
says [Linux] O/S is not supported. Are there any work-arounds for that?