I have just upgraded to Yosemite on my 2010 Macbook Pro. Everything seems to be running great except Adobe Illustrator CS3. The rest of the Adobe creative suite works fine - Photoshop, Indesign etc but not illustrator. When I first launched the app after the upgrade I was asked to install a Java upgrade which I did, I then re-launched Illustrator, it opened the initialising window and looked like it was going to work but it froze and I had to force quit. Now it doesn't get passed the initialising window and just doesn't open. I have cleaned the font cache and I have started my mac in safe mode, illustrator works in this mode, but when I start up again as normal it still doesn't work there. I have tried to find the preference file in users so I can delete it but I can't find this file and not really sure if this is what I need to do to get it working anyway! Sadly I don't have the installation discs so am unable to uninstall and then re-install the Suite. If anyone can give me help I would be very grateful! Just now I am very frustrated and wish I had never upgraded! Thanks in advance, and thanks for taking the time to read my thread.