Launch the program from the ribbon/Add-In tab or use the command TLCogoPointsRenumber. Type in a point group. Enclose the point group name with quotes if it contains spaces. Enter the new start point number. The points in the group will be renumbered starting from the number you specified 

The installer that ran when you downloaded this app/plug-in from Autodesk App Store will start installing the app/plug-in. OR, simply double-click the downloaded installer to install the app/plugin.

You may need to restart the Autodesk product to activate the app/plug-in.

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.

In certain cases, the program may terminate if it detects a duplicate point number leaving you with only a partially renumbered point group. To avoid this always make sure there are no other points with numbers falling inside the point number range you intend to use. For example, if you have a point group containing point 3 and another point group containing number 2,4,6,8 and you're renumbering the points in this second group the app will rename the first two points - 2->1, 4->2 but will not renumber pt 6 to 3 because such a point already exists and Autodesk® Civil 3D® does not allow duplicate cogo point numbers.