I just spent the last 3 days (on and off) troubleshooting why my Arduino IDE wouldn’t open properly on my Windows 7 64-bit machine. I thought I’d share the fix with the rest of the world as my Google searches returned nothing in the way of useful answers to my issue. For my issue, I’d click on arduino.exe and the splash screen would display, shortly afterwards, it would disappear along with the arduino.exe process that was running in the background. I had tried debugging the java launcher, that looked fine. I had checked permissions on the folder, flipped the compatability mode of the exe, you name it. In the end I needed to check the “disable visual themes” checkbox on the exe (see screenshot).
Full path to change this checkbox: C:path_to_arduinoarduino.exe > right-click >compatibility tab > check “disable visual themes” (not a bad idea to check “Run as Administrator” while you’re in here) > OK
Hopefully this helps someone else out there as they desperately scour the interwebs for a solution to get back into the IDE.