In order to truly Syncronize, set the app to "two -way". If not, one location will overwrite another. The overwrite happened to me and my client while set in "Syncronize", and we lost files and folders.

But it the "Two-Way" mode nothing was lost.

There also seems to be a limit of three scripts to set up. I have not yet tried the newest version.

It is very easy to set up and to use. I like using it.