1. Load a model 

2. Find “ProtoTech OBJ” tab in the ribbon bar. It contains following three ribbon buttons.

A) Export : 

After clicking here, a 'Save As' dialog will display on your screen.

A default file name will appear in the file name text box. You can edit this name.

Click Save button to export the current model to OBJ file. 

B) Preferences : 

It contains following options. 

• Precision : You can control how accurately your model needs to be exported. If you need fine representation of the model, just check the “use Precision” check box and the slider will be enabled. You can slide and select the values from 0 to 15. Higher is the value, finer is the representation you will get and larger is the file size. 
  
  
• Export Normals : You can choose if you want to export the normals. 

C) About : 

It displays the information about product and facility to activate your product license at any time.

3. After exporting, an OBJ file will be generated.

The installer that ran when you downloaded this app/plug-in from Autodesk App Store will start installing the app/plug-in. OR, simply double-click the downloaded installer to install the app/plugin. You may need to restart the Autodesk product to activate the app/plug-in. To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer, and select the "Uninstall" button. OR, click Control Panel > Programs > Programs and Features (Windows 7/8/8.1/10) and uninstall as you would any other application from your system.

We are not supporting textures and lines in this version.