In the FormatSwap Addon Tab, you will be able to find the Material Restore tool. you can use this to restore a selected material to the old version before the conversion process.
![](https://help.cgoutset.com/wp-content/uploads/2021/02/mr-1.png)
But you have to have the FormatSwap backup folder with the FormatSwap Backup file in your blend file directory. this backup file is created when you start a new conversion.
You blend file directory:
![](https://help.cgoutset.com/wp-content/uploads/2021/02/mr-2.png)
Remember that this backup file creation process is automatic if you have “Create a Backup File” Enabled when starting a new conversion
If you have the backup file in a different folder, you can manually place it.
WARNING: If you make a new conversion after another, this backup file will be replaced!