You've really done a great job troubleshooting the user access issues, The-IT-Guy. I understand you're now facing the challenge of linking the transactions from the rogue company file to your main company file. Let me provide additional information about merging your files with your workstations.

Since you’ve already resolved the other issues, which is great, it’s important to note that merging company files directly in QuickBooks is not possible. I recommend manually entering the data into your main company file so that all data entry will be accessible to other users.

Furthermore, you can consider looking into third-party applications that's designed for QuickBooks data migration.

Additionally, after you successfully access your workstations, you can export files to save a backup copy of your company files.

If you have any concerns or if you run into other challenges, feel free to ask. We're here to help you through this.