autoCAD LT 2013 for mac. Have had app several years and not had any problems until now. When I click to open the icon in dock at bottom bounces for a minuite or two then stops without opening. Have uninstalled and reinstalled twice. Used this link for the version conpatable with Yosemity:

http://knowledge.autodesk.com/support/autocad-lt-for-mac/downloads/caas/downloads/content/autocad-lt...

Restarted and shutdown multiple times. Operating systems is up to date (10.10.5). All other apps running fine including Adobe CS6.

Have deadlines and panic level is very high. Please, is there anyone out there who knows what I need to do?