The .BIN file is a proprietary Roland format that can only be read by Roland and BOSS instruments and devices during the update procedure.
Do not double-click on or try to open the individual update files contained within the update folder unless this step is specifically mentioned in the PROCEDURE FOR THE UPDATE.
If the files are double-clicked they will no longer be usable/readable by the Roland or BOSS instrument/device, and therefore it is recommended that the update folder be downloaded once again.