Here's what's been added to version 1.6.3:
Added: Unweld Vertex, useful for detaching faces or adding detail.
Added: Unweld Vertex Radial.
Added: ms3d.exe.manifest, which allows Luna controls under WinXP.
Replaced: completely new Ghoul2 Model importer (msGLMImporter.dll will be unloaded again).
Fixed: extrude tool doesn't try to extrude vertices, when no triangles are selected.
Changed: OpenGL errors are not logged into the ms3d.log, which could result in huge ms3d.log files.