Hi, I've got Creative Cloud, on a Mac Pro late 2010, 6 Core, 3.3 Gz, which has just been emptied and re-set with Yosemite. I've downloaded the Adobe stuff I need, especially Ps, Il, Id, Pp, Ae and Lightroom 5. Everything works find except Lightroom which doesn't open, giving me this message each time: "There has been an error during the modification of the modules." There is no error number attached and the program freezes. I've got a deadline which has been broken because I can't finish the work I've started in Lightroom 5 on my old computer which I deactivated in order to run the new one. Now I don't know what to do nor where to look for the problem. I've placed the Lightroom Library on an external LaCie 4Big 8Tb Raid 5.