Hi,
With CMX stopped, just copy all unzipped files and folders and paste in your working \CumulusMX folder, accept to replace all files.
Restart CMX.
p.s. Before upgrading I always take a full copy of the live \CumulusMX\ folder and place it in a CMX-backups folder - i.e. \CumulusMX-backups\v4.4.5-b4088\CumulusMX\ just in case!
Enjoy,
Paul