How to delete VST 2 plug-Ins that are not supported anymore (NUENDO 11)

In my /Library/Audio/Plug-Ins/VST/ I’ve got 3 Softube plug-ins that still keep asking for activation every time I start a session. I manually deleted them from the plug-in folder but in the "Gestionnaire de plug-ins VST (French for plug ins manager), they still appear in the “blocage” list and I don’t understand how to permanently delete them.
Now, I need to click “NO” when, at Nuendo launch, 3 windows pop up, asking if I want to activate the licence.
Help, anyone ?
Thank you! Have a great day