Save File
Use the 'Save File' command to save the CPT file in the current tab-page of the 'CPT File Window'. The existing filename and path will be used, if it is still valid. If not, the file-dialog will show to let you choose a new filename or path.
If you prefer to use an alternate name for the CPT file, you should use the 'Save File As' command rather than the 'Save File' command.