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I downloaded Processing 3.0.1-Windows64.zip on my PC (Windows 8.1). When I launch "processing.exe", the "Processing 3 An open project ..." window appears for 1 second then ... disappears. A different window, but the same problem, if I launch "processing-java-exe". This is probably a very trivial question ... any suggestion? (I had no problem with Processing 2.2.1)
Answers
Before anything else, try simply uninstalling (deleting) it, restarting your computer, and downloading a fresh copy. That seems to be a common fix to this problem.
Thank you KevinWorkman, I did as you suggested ... no change, same problem