You really should not have moved to El Capitan. CS5 is not supported and will never be updated to work with it.
Go back to your earlier operating system.
Great! Can you tell me how to go back or I guess upgrading InDesign is an option, but that is expensive.
Use your backup. If you don’t have one, I’m not sure what to tell you.
Your only possible upgrade path is to Creative Cloud.
Ok I made it work! I had't installed Java SE6 runtime fully as as soon as I did presto!
Thank for trying to help.