To uninstall SPListTreeViewEx web part, please close all opened Windows Explorers and other unnecessary programs before the operation and perform the following steps:

  1. Locate the SPListTreeViewEx installation package unzipped folder on your SharePoint Web Front End server.
  2. Double-click on setup.exe file to launch the installation wizard.
  3.  Click [Next] button to perform a system check.
  4. Click [Next] button to repair or remove the product.
  5. Ensure you choose “Remove” option, then click [Next] button.
  6. Click [Next] button to perform removing operation. 
    Depending on your environment, this step may take some time before you see the following message.
  7.  Click [Next] button to review the summary screen.
  8.  Click [Close] button to finish the uninstallation of the Web Part.