WARNING: DO YOUR BACKUP FIRST!!!
Make sure you do a back up in your normal way before you go changing things.
Just in case.
Now for those who have never backed up their WordPress sites please refer to the link below where Kyle explains how to do the back up for your website.
If you still have issues with back up or not sure post a question to all the community so all can see and then you will get an answer. You can click the pen top right and then select question and away you go someone will come and help.
This back up is important before any plugins you may need to try, change or adjust.
The steps below relating to Google Analytics should not be an issue but always good to get into the habit of backing up your work before you do an major service even some minor changes.
OK now that part is done lets get to what we came for.
Getting rid of these pesky Referral spams from your Google Analytics Dashboard.