This is not a bug but perhaps in a later iteration it can be changed so that it is more intuitive? The folder development in 3.10 is excellent but, in my experience (using my account on fiduswriter.com), folders are not created by using the tab ‘Create new folder’. Nothing happens. Rather, to create a new folder I have found that I first need to create a document - using ‘Create new document’ - and then select it and opt to move it to a folder. This then gives me an option of moving it to one of the existing folders and also creating a new folder that I can then successfully create. I’ve also found that if I delete the sole document in the new folder then the new folder disappears. Clearly, as it currently stands, folders can only exist if they contain documents.