Yup! Happens to me too. Only 1.5 though. I downgraded to 1.0.7 and it went away - but then I realized that I wouldn’t be able to open anything I made in 1.5.
I can have lots of instances of VItal open - such as in old projects, possibly made in 1.5.4 - but if I open the plug-in windows and start adding even a moderate amount of modulation, it invariably freezes and I have to reboot.
Soooo…
I deleted EVERYTHING pertaining to Vital on my Mac. All presets in the documents folder, all files found here:
/Applications/Vital.app
~/Library/Application Support/vital
~/Library/Caches/Vital
~/Library/Caches/Vital/audio.vital.standalone
~/Library/Cookies/audio.vital.standalone.binarycookies
~/Library/Preferences/autio.vital.standalone.plist
~/Library/Saved Applicaiton State/audio.vital.standalone.savedState
Reinstalled v1.5.1 and so far… no crashes or freezes. Fingers crossed. I’ll keep you posted.