Hi,
That's either this one:
https://docs.vmware.com/en/VMware-Fusion/12/com.vmware.fusion.using.doc/GUID-F230869E-D1DE-4EA2-B450...
If you can't get it to clear using either of those options then look at what VM is getting fired up.
Shut it down.
Open the VM bundle
Locate a folder in the bundle called "AppListCache" ..
Delete the whole folder. (or just the Wireshark one if you want to use other options, but I just tend to purge it all)
--
Wil