The v0.10.0 of has two files called release-bootstrap.nds and release-bootstrap-sdk5.nds that replaces the old ones in the _nds/ folder.
Due to the fast paced work being done on , the latest stable release (as of now) is v4.4.0 (Rev 01). Older versions may not be compatible with the latest nds-bootstrap files.
* Remember, DSiMenu++ is NOT nds-bootstrap. They're more like two faces of the same coin, with DSiMenu++ being the frontend and nds-bootstrap being the backend.
Follow the steps under Instructions (No flashcard, 3DS/2DS users) for updating