Aperture 3.6 will not start after new install
Rebuilt my Mac Mini with a clean install of Yosemite 10.10.2 and reinstalled all my apps. Downloaded and installed Aperture from the App Store but it will not start. No crash, just nothing. Does its animated thing when double-clicked in Finder, and goes through the usual launch action from Launchpad, but then nothing. No icon in the dock, does not appear (even momentarily) in Activity Monitor. I have Final Cut Express installed and have seen other launch issues with this combo, but they all seem to result in an Aperture crash. Any ideas?
Mac mini, OS X Yosemite (10.10.2)