After a long time, SBWin (formerly SMD BIN WIN) has a new release.
Version 3.0.0b1 (Beta 1) is a complete overhaul of the entire program, with lots of bug fixes and new features.
Improved Features:
Redesigned user interface, with modern Windows styles support
Better error handling
File conversion stability improved
Brand New Features:
File compression
File type identification
New conversion core (more stable)
Mixed conversion (convert mixed file types all at once)
Software updater
Much more