Ok 
Maybe try make sure you only have one set of their DLL files in your various VST folders and also activate/register all your Waves plugins before scanning.
When that’s done remove the “CachedFailedVSTs_x64.db and CachedFailedVST3s_x64.db” in your Renoise preferences folder (In Renoise click help>Show preferences folder) and do another plugin scan.