Because it took me nearly 2 hours to parse through the old posts and figure out which ones were out of date and finally resolve this issue (why the creator doesn't just remove the code from the install himself is any body's guess, or spent 5 mins creating a simple outline like this to include in the install notes), I created a simple fix for this.
This was done for a vBulletin 3.6.8 install and using Cyb Advanced Forum Rules 3.6
1. After install, click on "Languages & Phrases" in the left nav of AdminCP
Click "Search in Phrases"
In Search for Test enter "font"
in Product Drop down: select "Cyb - Advanced Forum Rules"
Click Find
Search results will spit out the following:
"cybfrules_rules Standard Phrase <font color="#66ff00">Forum Rules</font>"
Click Edit button
Click Copy Default Text button, remove font tags, so only "Forum Rules" is left, click save
Alternatively you could just copy and paste "Forum Rules" (without the quotes) into the English (US) Translation text box.
Click Save
Done.