Type KM or select the icon in the ribbon.

On the command line, you will be asked whether to work with Texts or Blocks.

Then select the items or options in the dialog.

Subsequently, it is proposed whether to operate on the content of the Texts or the Attributes of the blocks: 

Apply to [Blocks / Texts]? <Texts>:

If you select the "Texts" options you will be prompted to select texts you want to transform. 

For example, the text "12568" will be transformed into "km12+568". Conversely, if you select a text like "km12+568" it will be transformed into "12568". 

If you select the "Blocks" option, a dialog box will be shown through which you will select the blocks on which change distance value ("Select blocks >" button).

Subsequently - by pressing the "Attribute..." button - will be possible to select the attribute that contains the measure (distance) on which to perform the conversion. 

Finally, via the "Add/Remove KM" button, the conversion is started. 

During the transformation from 'kilometric' notation to a simple number, it is possible to establish how many decimal digits must be represented. The number is set using the KM_CFG configuration command.

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.