InDesign crashing on startup, not in new user account—what to do

[matua]

Hello. My InDesign CS5 crashes on startup in my regular user account, but runs fine in a newly set up one. Crash report says:

Time Awake Since Boot: 81 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)

Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000020

Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11

Termination Reason:    Namespace SIGNAL, Code 0xb

Terminating Process:   exc handler [0]

VM Regions Near 0x20:

-->

deleted preferences file and tried booting in safe mode, neither brought any change. Can anyone interpret the crash lor or suggest any next steps otherwise?

Thanks

MacBook Pro Retina 15-inch Mid 2005, MacOS Sierra 10.12.2

[BobLevine]

CS5 is not supported under Sierra. Unfortunately you’re on your own.

If you can get it to run under the new account, I would just use that rather than risking losing that ability.