I have a similar problem in that the Arduino 1.8.9 IDE starts the splash screen then disappears. I tried run the arduino_debug.exe and I get a message but the program goes away as well. I can't read that fast. I have reloaded three times today with both the Zip and Exe versions. I went to C:\user\paul\appdata\local\arduino15 and removed all but the preferences.txt file. Restarted the computer with no result. Can anyone help
Paul