From CHANGELOG.md:
Fixed
- invader-build: Fix defaulting model filthy part indices.
Changed
- invader-build: bitmap sequence index is now checked in more places.
- invader-build: particle system tags are now checked to make sure an extra
bitmap sequence is available after the one referenced when using the "rotational"
complex sprite render mode. - invader-edit-qt: grenade_hud_interface field naming has been made clearer.