Refreshing the VST manager doesn't get rid of previous plugins

Earlier today I wanted to see how many of the VSTs that came with FL Studio on my PC I could access in Cubase so I pointed the VST manager search path at the top-level folder for FL Studio’s VST’s and did a refresh/rescan. I found I was able to run lots of them but many of the ones I got weren’t interesting or they were just demo-versions so I deleted that path and replaced it with paths just to the ones I wanted - DirectWave, Sakura and GMS. But when I did a refresh and Re-scan the old ones didn’t go away! As you can see in the attached image, it still shows Morphine, Sawer, Poizone, etc. How do I get these off my list?

Thanks in advance.

Hello? Any idea how to get rid of these things?