How do i change the HTML file names for existing index

hi,

how change existing html file names indexes. html file name disabled when click on properties.

ex: index keywork : architecture

old html page/url =: architecture.htm

i want change old html page/url =: architecture.htm architecture_new.htm

please find screenshot attached.

when change topic name, robohelp automatically updates in index , elsewhere.

if have done create new topic , want associate index keyword, double click index in project manager , change topic associated there.

see www.grainge.org robohelp , authoring tips

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