I have done a routine OS X upgrade (mac) yesterday to version 10.9.5. Since then, Lightroom (4.4) has crashed more times than I can count. It is impossible to access the Slideshow Module as it crashes right away. Lightroom is completely useless at the moment as it also crashed in other modules after a few minutes. PLEASE HELP as I really need Lightroom for my photography business!!! Anyone else experimenting this? What can I do to rectify this?!