Hi,
Glad to hear that you managed to fix this.
Could you see if you have a backup copy of the file prior to you fixing it? You can check your backups via Tools → Manage Backups. When restoring an older version, you will be prompted to ask where to save it - just be careful to give it a new name and not overwrite the current version.
If you do have a backup, it would be great if you could email the file to support@aeontimeline.com so that we can investigate and understand what was happening in this case.
Thanks,
Matt