Thank you Tom, but I mean the VST-Presets of Cubase Pro 8.5 itself! My own presets I saved are not recalled at all when selecting them from the MediaBay (part of Cubase). 

Internal plug in preset system seems to work – it is ‘just’ the connection to the Cubase file system broken. Other most recent Eventide plug ins work fine with it as does the older version of UlraReverb, which I re-installed to continue using my presets.