We will probably retire the link to download the premium tools separately. If you update your Lansweeper installation to the latest version, you should have the latest version of the RemoteUninst.exe as well. Update instructions can be found on page 103 and beyond of our online documentation.
On the main page of your installation there is a link in the lower right corner "Check for Updates" it then does a compare against the Lansweeper.com page for version info