Open: Allows you to load an SBSAR file.
Open Recent File: Here you can choose to open again one of the last ten opened files.
Load textures from disk: The purpose of this option is to allow you to load existing textures from the disk, assign them to the available Thea material textures slots, see the material preview and save the result as a new Thea material file (mat.thea or mat.pack). By clicking on a button on the left column a load dialog appears where you can select the texture you want to load. By clicking the clear button on the right column any loaded texture is unlinked from the material. When you want to create a new Thea material with the currently loaded textures, you can click the Save button.
Batch Conversion: The Batch Conversion option allows you to convert multiple SBSAR files to Thea materials at once. When you put your mouse cursor over the Batch Conversion option you will see two available choices: .mat.thea and .mat.pack
Save: You can use this option to save a Thea material (mat.thea) file in the same folder where the Substance™ file was loaded from.
Save as: Clicking on this option a dialog appears where you can select the directory where the Thea material will be saved. Furthermore, you can choose wether the new file will be saved as a mat.thea or as a mat.pack file.
Texture Size: As also described in the Textures Viewer section, you can use this menu option to choose if the textures will be presented in their actual size or if they will be scaled to fit the available area.
Substance™ Engine: Here you can select the specific implementation of the Substance™ Engine you want to use. There is a software implementation (CPU) which is always available and depending on the platform you may have the options of OpenGL, Direct3D 10 or Direct3D 11.