InDesign Won't Open

[jcronin_iamu]

I have tried both opening existing files and starting new ones. InDesign will go through the initializing to open but then nothing. Sometimes when I try to create a new project, it will give me the initial screen to set up a New Document, but again then nothing. It was working fine yesterday, no pending updates, all other programs (Illustrator, PhotoShop, etc.) are working fine.

[kglad]

reset your preferences -   https://forums.adobe.com/thread/526990

[Sheena Kaul]

Moving to InDesign​

[Steve Werner]

As kglad said, restoring your preferences is the first step. Here's another link:

Trash, Replace, Reset, or Restore the application Preferences