General usage instruction is as follows:

Click on the function button "Batch Update Thumbnail" under the CherryBIM tools tab and Batch tasks panel.

A new window form opens. 

Click on the "Add Folder" button or "Add Files" button to browse and add the Revit families whose thumbnail you want to update. If you want to remove some families, select and click on the Remove button.

Click on the "Thumbnail Option" icon to set the custom setting for Thumbnail:

• View direction
• Visual Style
• Detail Level
• Option to show or hide dimensions, ref lines, ref planes, levels, connectors, host elements, imported categories and light sources
• Background set up with Gradient and Sky options
• Reset default option

Set the output folder

Add name prefix or suffix if needed

Run the add-in and wait until it finishes.

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 7/8.1/10) and uninstall as you would any other application from your system. 

Note: Please uninstall the older version before installing the new one. 

Activation guide:

The add in is automatically active based on the Autodesk account you have use to purchase the add in, so please make sure to log in Revit with the Autodesk account before you start using the add in.