The assisted install file will always be empty, that's for you to fill in, in case you want to save yourself the dialogs from the installer.
Try inputting your name for the organization also, if it is in all upper case in your confirmation email then do the same in the dialog.
didn't know that about the assisted install.
Now it's strange because I tried everything and it's just not accepting the license.
Bought it in the official store, FM16 pro full version download.
I entered the code myself again but this time without the dashes in between the groups.
That worked instantly. Strange thing.