Follow the below steps.

- Install the App using downloaded .msi file

- Launch Autodesk® AutoCAD® 2019/2020

- The app will be loaded under "Add-ins" tab

- You can start the App using following commands SIGPLACE and SIGFIND

SIGPLACE - to place the CADsecurity Signature

SIGFIND - to search for CADsecurity Signatures

SIGMARK - to place Watermark

After downloading the app from the Autodesk App Store, double click on the 'install-cadsecurity-signature.msi' file to install the app.

Go to Windows Settings->Search for 'Apps'->Apps & features select the 'CADsecurity Signature' click on 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.