All files with the number 2 on them are project files except for FaceBook Angry and Facebook Emoji Love which are project files but do not have the number 2 in their names.Project files can only be opened in MonsterMash.zone online and you can only import them in the form of zip files.The other zip files are OBJs and MTLs with their texture map inside. All must be kept within the same folder.The GLB files are within the Main zip within folders. You can use these as pillows or buttons for your game or movie.You can convert this to an STL, but it's pivital to only use 3D printers that pay attention to the color of the file and print out the model with the colors intact or will it will look like a hard, gray pillow. The STL file that is already in there doesn't have texture, and you can color it in blender and Paint 3D however you want.