[oddthink]

On Mac at least, you just have to download the zipped disk image and copy over the contents. I just put it in ~/Applications, and it worked.

[pasc1878]

You can run it from anywhere including where you downloaded that has user write access.

But you have to keep everything in the top directory and copy that around not the .app

It is not packaged as a Mac Application that is all in a .app file which you can copy to /Applications. Most of the other files should be in ~/Application Support or ~/Documents to meet normal macOS directories.