Help: Calibre crashing on Macbook Pro

Hi! Sorry if I'm posting in the wring place, it's my first post...

I haven't used my kindle in a few weeks, maybe even a few months, and when I tried to open Calibre on my MacBook Pro all hell broke loose: the pad started acting weird, a few folders close and opened again, and suddenly the Mac started making some really scary noises. The only way I was able to stop it was restarting. I have a feeling the problem starts in the trackpad as I open Calibre, but I don't know enough to verify it (much less to solve it).

I reinstalled with the new version but it kept happening, and I have no idea what to do next. Has this happened to anyone else? How can I fix it?

Thanks in advance!