Thank you for the tip 

 I don't know if it would work, but I can at least give it a try : save a copy of this file before anything else and then try and modify it in  he way you suggested it. If it's rotten, I would replace it by the saved file. 
 
I think I should give an attentive eye to the content of this particular file as I may learn a lot about my Glo behaviour 
