[Ham-Mac] AD5RX morse trainer?

[EZ Rhino]

Hi Group-

Has anyone tried the AD5RX Morse Trainer yet?  I heard about it today  
and downloaded it.  However, after placing it in my app's folder, and  
double clicking it to open, it won't open.  The icon bounces in the  
dock like most opening apps do, but then disappears and does not  
open.  I'm wondering if the app is corrupted, or if I'm doing  
something wrong?

Chris
KF7P