We've heard from about 4 – 5 people who've had this same problem, and unfortunately, we haven't yet been able to figure out what's causing it.  It only affects some Yosemite users, and we haven't been able to reproduce it on any of the Yosemite computers we have in the office.  Could you send an email to support@eventide.com about this and let us know what other computers (if any) you have access to? We might have to see if we can get another updating application to work for you.