I'm sorry to hear that you're having trouble exporting your document.
Are you using the demo version of in5? If so, it has some limitations including only rendering text as images. Here's more info about the demo version:
As for the crashing, you might try saving an IDML file, saving it as an INDD file, and exporting that. That process can fix minor corruption in a file. Here's more info:
If you're still having trouble exporting, we'd be happy to take a look at your InDesign file for troubleshooting. You can send it to us at: