If you get an error that says “Error in Scanning Batch. 743 – Unable to create or activate a new instance of ‘Simple.FileEditor.Client.ImageViewer’.” after running previous batches successfully then the SimpleIndex Windows Layout is corrupt.
To resolve locate this folder in Windows Exporer/My Computer:
C:\Users\<Windows User Name>\AppData\Local\Simple_Folder
(<Windows User Name> = Windows user currently logged into the computer that is receiving this error)
Then delete this folder and reopen SimpleIndex.