When you use the Telerik Data Access Mapping Migration Tool for upgrading Reverse-mapped projects done with previous versions of Telerik Data Access to the new .RLINQ version required for the Visual Designer, a backup of the upgraded project is created. That backup will be placed in a folder named ProjectName_Backup. That folder is a sub-folder of the project folder.
In order to restore the previous state of your project:
- Delete everything from the project folder except for the ProjectName_Backup sub-folder.
- Move the content from the ProjectName_Backup folder to the project folder.