Krakens, it's working for me!! It may be because I bought KSP from Steam, and so I`m entitled to every KSP version available from them. Or perhaps because I already had downloaded it in 2018/Xmas and so I had a free license from that time. I still can select these ones from the BETA Program: In a way or another, it's a shame.  — — — POST EDIT — — —  It should be because I had "bought" it previously, from the times it was available...   Well