Several comments. The help was extremely brief. Even after reading it it was somewhat a guessing game for the utility.
I tried it and dragged 4 files to the utility window. It seemed to work but were or were did it put the zip file? I eventually found it and it was someplace you wouldn't expect to find it. It was on the same volume but in a completely disconnected folder. There doesn't seem to be a default as to where to put the zip file so instead of logically putting it in the same folder it puts it someplace else and you have to go searching for it.
The help needs expansion and either an option to where the zip file should be created or at least default it to the same folder.