I am afraid not ...
Like I said those lines are simply the bottom lines of the rows that are not properly displayed at your screen ...
It looks like you don't use the default theme of Windows (others colours in RegSupreme Pro windows than normal colours).
Sometimes that disturbs the proper displaying of some windows in some programs (applications) ...
I'd try Windows default theme and see what happens :
PS: by the way, are you using the most recent version of RegSupreme Pro?