Save File As
Use the 'Save File As' command to save the CPT file in the current tab-page of the 'CPT File Window' under a new path or name. The existing filename and path will be shown, if it is still valid, and then you can you choose a new filename or navigate to a different drive or directory.
You can also use the 'Save File As' command to save the file with it's existing name, by not altering the current details in the file-dialog, and just clicking 'Save'. You will be asked if you wish to replace the existing file with this one: just answer 'Yes'.
When the 'Save File As' command completes, the new filename will be shown on the tab of the current tab-page of the 'CPT File Window', and, if the file had been altered, the tab-color will change from red to blue, indicating that the altered state has been canceled.
The full page-name, with path-information, is shown in the Status Bar when you hover over the page's colored tab.