If you update to the latest version of LinkWare, you can now do this under Properties. Here is the article describing this.
This feature is not officially supported by Fluke Networks. Whilst we have had no reports of customers damaging files, back up your file before doing this.
In LinkWare, highlight the records you need to change the names for End 1 and End 2. On your computer keyboard, press CTRL ALT E to see the following window open:
If you accept the warning, click ok to see:
Simply enter your new names here and click ok.