From the “Corporate Software Purge” department…Old winzip backup command:
wzzip -u -r -p -ybc -whs -bC:\ %backupdir%\%projname%.zip -i@%backupdir%\Files.txt
New 7zip backup command:
7z a -r -y -tzip %backupdir%\%projname%.zip @%backupdir%\Files.txt
Simple!