Help - My stand alone version of LR 6 was working on my iMac (10.11.2) up until yesterday. Now it won't open ( the LR icon appears on the dashboard, disappears, and I get a lengthy problem report that is being sent to Apple automatically). I contacted Apple and they had me restart my Mac and attempt to reopen LR. When it failed again, they essentially told me it's not their problem. I'm not very computer literate and need help resolving this problem. I've un-installed and re-installed LR 6 several times but that doesn't help.