Demo version demonstrates the full functionality of the app with one exception: it does not allow you to download movies. You can connect to camera, download images, delete files, if you copy any H.265 files into the working folder also convert videos and play them in the media player.
Click on this image and download the demo version installer:
You will be guided through the installation in 4 simple steps:
DMG image is first opened:
Once done, a typical mac installer window appears
You need to drag the app icon and drop it onto the Application folder.
Then close the window, unmount the DMG in Finder and run the app from Applications