Those things don't have installers, they are just DLLs sitting in the folder, completely harmless but an excellent indicator of what's going on. Orion, Cubase and Studio One all manage to deal with them and start in a few seconds, only Maschine and Komplete Kontrol take forever and trip over those files.
There are no plugins in Studio One's Blocklist. It scans those plugins and deals with them perfectly well every start-up. I think that some hosts perform deeper scans than others. Orion, for example, never seemed to scan plugins at start-up but it always found new ones if they were there. Studio One seems similar - it does a scan but it's quick unless it finds new plugins. It probably knows what was there before and what's new, skipping over things it knows about and only looking closely at the new stuff. But the NI hosts seem to do the deep scan every time.That is most likely also the reason why Maschine takes so long to start. Most DAWs have some kind of blacklist for plugins that can't be scanned properly (like those expired demos) so they will not get scanned again in the future. Maschine does not have such blacklist, so it will attempt to scan those demos at every startup.