I'm having this issue - Speedgrade won't launch via standard app opening or "direct link" from premiere. The application simply won't launch. I've reinstalled several times, I've also deleted all preferences and plists regarding speedgrade, I've also the entire CC '14 suite as well as the Creative Cloud program itself. No changes - Speedgrade will not open.
This is a catastrophic problem in my team's workflow. We just went from color-capable to not even able to manually color a sequence using speegrade.
We are all paying our CC fees and expect these products to perform as advertised - please advise.