MacOS – get rid of uninstalled app from updates in app store

In the app store, I have a update for an app called "Nepenthes", by Wei Li, which claims to be "for enterprise solution".

However, I've never installed an app by that name, and I can't find it anywhere on the drive.

How do I get rid of it – in two parts:

1) How do I get rid of the update listing in the app store? (I've tried removing ~/Library/Caches/com.apple.commerce/updates.plist and rebooting.

2) How do I make sure it is not installed? (other than not finding it on the hard drive)

Thanks,
Russ