When you install a new version of Silk Test, the wizard prompts you to uninstall any existing versions of Silk Test. You can also uninstall Silk Test from the programs menu at any time.
For example, on Windows 7 this directory is located at: C:\Users\[username]\AppData\Roaming\Silk\Silk Test.
For example, on Windows 7 this directory is located at: C:\ProgramData\Silk Test.
For example, on Windows 7 this directory is located at: C:\ProgramData\Silk Test Workbench.