can't open wavelab pro 9 on mac

i have installed it on my macbook pro (i have tried both 10.11.5 and 10.11.6). first time use everything was fine. after cmmand + q (quit) it couldn’t be open anymore. each time it appears an “unexpectedly quit” warning. re-install doesn’t helps.
any one has idea?

Try erasing this folder:
/Users/YourName/Library/Preferences/WaveLab Pro 9/