Not an Intuitive interface, also crashes system

Just discovered Audirvana, Downloaded and installed trial version on iMac 10:13:6 High Sierra. Not an auspicious start, crashed system first & second time of opening. Eventually deleted/reloaded and found confronted with player page but unable to load music from resident files! NOT Intuitive and after wasting more than an hour have seriously considered un-installing. Glad it’s only a trial version. NOT IMPRESSED so far!