I heard some time ago that Notepad++ has an unsafe update mechanism that allows man-in-the-middle attacks which is not an out of the world scenario with the current internet infrastructure. So I researched a bit and would like to share my results:
1) I could not easily find any statement by the notepad++ community explaining the update mechanism
2) it was easier to find an exploit toolkit promising to automate an attack against Notepad++ and others than finding any comment about security on the Notepad++ wiki/forums
3) There is no Topic in the "articles by Topic" section on the Wiki called security

Please take the topic security seriously and I am still interested in links to any security related article about Notepad++. Apart from that: Great work! Nice Program!