How to manually delete shared folders?

OMV doesn't let me delete a folder.

I deleted all the users to make sure they weren't locking the folder and stopped all the services (all but SSH).
Still no luck.

Is there a way to get rid of that manually editing a file?

(I have to say I messed a bit with the filesystem, so I wouldn't really call it a bug)

The only plugin mentioning the folder is transmisson, but it's not running.

It doesn't let me delete the folder, i can only pick a different one but I have no folders other than that.

EDIT: after uninstalling the plugin i managed to delete the folder thanks