i uninstallted the software, as it normal, using control panel program and features.
really no reason to suggest the need for more by suggesting this
https://www.remoteutilities.com/support/docs/installing-and-uninstalling/#Uninstalling_Viewerbut just now i followed the steps for removing the viewer.
including the deletion of folder C:\Users\user01\AppData\Roaming\Remote Utilities Files
then i start the portable version, running C:\data\c\remote.utilities\ru.viewer.portable\rutview.exe
for some reason rut RE-CREATES the folder C:\Users\user01\AppData\Roaming\Remote Utilities Files and then rut creates a file named config_4.xml
and when i exit rut, rut creates MORE NEW files in that folder.