What old version did you have?
Did you run the new version of AE before you deleted the old one?
What exact version number of AE are you trying to run now?
What version number is your OS?
Have you tried uninstalling, running the Adobe CC Cleaner tool and reinstalling ?
In the future, to get better-looking shots of your screen, do a screenshot instead of taking a photo. Mac OSX provides an several easy ways to do it. To take a shot of just a section of your screen:
Close all Adobe Programs.
Quit all Adobe Processes in Activity monitor.
Launch Creative Cloud > Sign In.
Launch After Effects first and then open the project by clicking on File > Open.