Photoshop running perfectly for years - this morning it won't even open
Hi - I have an older version of Photoshop (CS4) that I use on my MacBook Pro running Mojave. I've been running it for years and it has never had any problems. I use it almost daily. I tried to open it from the dock this morning, and the icon bounced once and then quit. I got the "Photoshop quit unexpectedly" window. I tried launching from Launchpad and from the app within the Applications folder. No love. Same actions, same message.
I have changed literally nothing on my MBP from yesterday to today. I hope someone can help me.