Here is what happened (case: 1190110): - I thought I will try the Rider because I heard many good things about it. - I installed the Rider - Restarted my computer at the end - When my OS (Windows 10 Home) came online - Started Unity 2020.1 (playing around) - Opened the Package Manager and Installed the Rider extension - Opened the Edit/Preferences/External tools. - I have set the editor to the Rider - Result: - At this point I have closed the preferences because I couldn't go back to the full window. - I created a Test.cs file - I hit the ENTER so Rider would open up and I can edit the file. - Unity Editor crashed at this point.