I am using Win500 on a window10 PC.
I have downloaded a .cvs file from RR.
Win500 has an option to import a .cvs file.
However after performing the import, no new frequencies are added to CONV or TGRP.
I have seen the error of my ways.
I noticed I can add my own tag when importing the frequency group.
For instance, when importing the International Space Station, I added ISS as a tag to each frequency.
Now I have ISS-xxx.xx