Since it is late and I felt your urgency, I wanted to respond.
I am fairly certain that I saw BJ mention this not too long ago. Don't worry it will be alright.
You just have to create a folder/sheet and then choose the mode you actually wanted. I am not sure if that is about the folder, the sheet or both! ;)

You will not be stuck in purgatory. I am sure if that does not help enough he can direct you. 

Patricia Palumbo

> -----Original Message-----
> From: School Information Technology Discussion [mailto:SCHOOL-
> [log in to unmask]] On Behalf Of Ben Leslie
> Sent: Thursday, December 19, 2013 11:02 AM
> To: [log in to unmask]
> Subject: gClassFolders - School Mode
> 
> I'm hoping BJ will chime in real quickly with an answer to this...
> 
> We have a few teachers who are using gClassFolders and I'm considering
> rolling it out in school mode next year, reading some of the warnings in the
> script setup, this one in particular "Choose carefully! Once student folders
> have been generated, it is not possible to switch modes"....have we
> essentially made the school mode unusable due to the few teachers who
> have already made student folders?
> 
> 
> Thanks
> Ben Leslie
> IT Manager, BVSU