Serious crashes in a row shutting down Imac

Hi,

I´ve installed Soulseek 2015-8-21 on my Imac with Mavericks and serious crashes in a row shutting down my Imac. After a while I formatted it from cero installing OSX 10.11 El Capitán, what is my surprise? Still crash and shutting down when I use Soulseek. Anyone has the same problem? How can I solve it?

Thanks you so much :)