Thanks for visiting Folder's support site. I'd like to address some confusion that has been asked about.
First, when you initially start folder, your folder is empty. This is normal until you place something in your folder. The next version of Folder will show a message to you when your folder is empty. If you need to add something to your folder you can connect your iPad to iTunes and do so in the apps tab.
Second, there has been some confusion regarding some applications not being able to open a file even though the user expects this to work. If you have an instance where a file isn't opening in another program please email us about it and we will look into this for you.
Third, we will be adding an edit button for deleting files in the next version. Currently you can swipe your finger across a filename and a delete button will appear on the right. This works fine, but an edit button will help make this more clear.
Finally we have been considering adding an email option for files in folder. If you would like to see this please let us know.
Any additional feedback is welcome. Thanks again for using folder!