After corona turns over the material, the file can no longer open
Please provide more information - what version of Corona (daily builds?), did scene crashed (provide minidump).
Moving to i need help board, until more info on the issue will be provided.
corona 3.0
corona converter 1.42
Save two files, won’t be able to open them
Did you tried to merge them in new scene?
I can see what you have many plugins what may broke something and conflict with other plugins.
Read log file
Please generate a minidump file when the error is visible and send it to us. Here is how to do it: https://coronarenderer.freshdesk.com/support/solutions/articles/5000524006#crashes2