This problem is caused by a corrupted settings file. You can delete the corrupt file by following the steps below.
- Type or paste: %APPDATA%/XLShareBoard into the File Explorer or the Windows Run/Search bar and press enter.
- That should open the folder that contains the XL Share Board settings file.
- Select and delete the "settings" file.
- XL Share Board will recreate the settings file when you run it again.