Failure to open

I’ve installed this app times onto my iMAC OS10.11.5. It semi-opened the first attempt to use it, then just stopped when trying to login via Facebook. Henceforth after re-installs, nothing happends when clicking on the app to open it, even after system reboots. Definitely sorry I bought this app.

JimC: Art-lover about Pin Pro for Pinterest, v1.9