I am running Yosemite 10.10.5 on a macbook pro
I have downloaded the latest version of the software direct from the website.
"Requires an Apple Mac running 64-bit macOS 10.6 to 10.12 Sierra."
It installs fine, but when I try to launch it the icon just bounces and then stops responding listed in the 'force quite' menu as clearly my operating system is not Sierra.
I have tried downloading an older version just to see, but it just does the same, so 1.14.451 and osx 10.5 1.7.236
I have tried repairing permission etc just incase.
I used to have it a few years ago and it worked fine.
Thanks for any replies.