Hi @climate-file apologies for the late reply, and the lack of clarity of the UI on this front.
If there's a single element selected you can directly press on "Export", the selected name will be used instead. 😉
The "input" field is there for cases where multiple ones are selected, or cases where a single one is, but you'd rather have a different name on it.
It will only prompt about a name whenever there's more than one selected, and the input field is empty.