I accidentally created an open discussion item instead of a ticket: https://sourceforge.net/p/notepad-plus/discussion/331753/thread/2cdeb3d8/
I recently upgraded to v6.3.3 hoping that the issue would be resolved, but it's not. Also, Notepad++, upon crashing, completely wiped out one of my files. I did have a backup, though, so no worries...but a little troublesome.
I was about to try safemode, but instead, tried running Notepad++ as Administrator. Now it doesn't crash. Looks like something may have changed between Windows 7 and Windows 8, because I definitely did not experience this issue with Windows 7.
Thought you'd like to know.