To add files to the list, follow these steps: 

Press the "Add File" button. This will trigger a standard dialog box to open.

In the dialog box, navigate to the location of the file you want to add.

By default, the visible file types in the dialog box are set to zip format. To view .dwg files, you need to change the "Type" field to "All".

Once you've changed the "Type" field to "All," you will be able to see all file types, including .dwg files.

Select the file(s) you want to add to the list by clicking on them.

If you want to add multiple .dwg and .zip files, you can also drag and drop them directly into the list.

To install the app, you can download the installer from the Autodesk App Store. Once the installer is downloaded, simply double-click on it to initiate the installation process.

Upon launching the app for the first time, it will prompt you to enter your user ID. You can easily obtain the user ID by typing "ONLINEUSERID" in the Autodesk® AutoCAD® command line. Copy the ID generated and paste it into the app, then press the "Login" button to proceed.

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 7/8.1/10/11) and uninstall as you would any other application from your system.