FTR, I have been using Samsung SSDs, for about 8 years now, starting with Windows 7. I have never found Samsung Magician helpful, except to run Secure Erase which I have only had to do once in 8 years. In fact, I found Samsung Magician to be more of a pain than of any value.
It is critical to note operating systems, including Windows 7, know how to use and manage SSDs just fine without any 3rd party middleman software. If me, I would not reinstall it.