What to do with those files in Programm data , mainly NI stuff !! and a lot (since i have K9 ultimate !!)
 

 
And then each one has one NI soft :
 

A lot of that is "uninstall" information I believe.

Notice that the file/folder names appear to be Registry "Keys" from the registry.
If you have a PC Cleanup utility it will get rid of the things "left behind" by an install.
But the other things are usually related to the Program "uninstall" info...

no Registry cleaning utility (dangerous) , so it's gonna be all manual that's why i'm double checking with you guyz ....