remove reference edits

 If you have made changes to your reference file which has then caused incorrect results, For example making changes to an expression then saving the reference file causes you to lose your expression information; simply reloading the reference file will not be enough to get the original data back.  

You will need to remove the wrong edits.   In order to do this you need to unload your reference from the Reference Editor, and then go to Reference Editor ->List Reference Edits.   In the window that pops up select the wrong edits and click on Remove Selected Edits.  Once this is done you can Reload you reference, through the reference editor.