Some of my students has created a board which doesn´t enter to my free account. So I have lost editing rights in my principal board which I use with a lot of different groups. I can´t delete any of the boards I have, except for the main one, which I really need. I need the support group to help me to delete the unneeded boards and let me work free of charge as I did before. I really can´t go for the upgraded version. 

Thank you!