This addon doesn't use nameplates or mouseover units to find rares. Instead, it checks your creature cache for the moment a rare mob is found. There is one catch to this technique however: Once a mob is “found”,
_NPCScan won't be able to find it again until your cache is cleared. If you find a rare mob's corpse—
Dirkee for example—you would have to clear your cache before _NPCScan would find Dirkee again. Thankfully, clearing your cache is a safe and simple matter.
Clearing Your Cache
To clear your cache, follow these straightforward steps:
- Exit World of Warcraft.
- Delete the “Cache” sub-directory inside your World of Warcraft folder. For example on a standard Windows XP installation, you would delete the folder “C:\Program Files\World of Warcraft\Cache”.
- Advanced users can delete “C:\Program Files\World of Warcraft\Cache\WDB\enUS\creaturecache.wdb” specifically to improve log-in times, where enUS is your language code.
Note: Windows Vista and Windows 7 users see this info if your cache isn't in the location above. That's it. Log in after you've done that and you'd be able to find Dirkee a second time. It's completely safe because WoW will recreate your Cache folder after you log in again.