Hopefully this issue can be resolved - regardless of whom which fixes it - and in the most timely manner as possible. Naturally, everything I've been writing and recording has been done on my Mac, as well as where all of my samples are, and have had to suffice with creating tones on Windows, for now.
For anyone considering the upgrade to 10.10, do not do it, unless you have a backup ready, and you're aware of the risk you run - this being an example. It was my own fault for upgrading and not considering 10.10 = 10.1 (especially since I write code), and that software may not run because of it. I've learned my lesson, that's for sure.