You can open in <oXygen/> and edit files directly from an archive.
When saving the archived file you will be prompted with some backup operations which can be performed to ensure that your archive data will not be corrupted.
You have the following backup before save options :
Perform no backup of the archive before save. This means that the file will be saved directly in the archive without any additional precautions.
Before any operation which modifies the archive is performed,
the archive contents will be duplicated. The duplicate file name
will be originalArchiveFileName.bak
and will
be saved in the same directory.
Before each operation which modifies the archive is performed,
the archive contents will be duplicated. The duplicate file names
will be originalArchiveFileName.bak#dupNo
and the files will be saved in the same directory.
Check this if you do not want to be notified again to backup. The last backup option you chose will always be used as the default one.
You can re-enable the dialog pop-up from the Messages preferences page.