Here are the few steps to get Ellié Computing Merge
working on your Mac:
download the disk image file.
Double-click the disk image file (.dmg) which will open,
and show Ellié Computing Merge application, the licence
agreement and a link to the main Applications folder.
For a shared installation, drag'n'drop Ellié
Computing Merge application to the Applications link, it will
copy Ellié Computing Merge and make it available for all
the users of your Mac.
For a single user installation, put Ellié Computing
Merge wherever you like, for example, somewhere in your home
directory.
The evaluation of Ellié Computing Merge requires
a Serial Number to run permanently. You can evaluate it for
free without a serial number. More
infos.