I just realized I am having this problem also (well it seems to be the same), yesterday rocket was working fine but today it loads up fine but if I try to open assets (I can still open textures) or press play I get the “this program has stopped working” message, it also crashes during the loading screen when creating a new project, I have tried uninstalling/reinstalling with no luck, I also tried uninstalling beta 3 and reinstalling beta 2 witch also crashed when I tried to create a new project.
I haven’t updated anything, installed anything or changed my system in any way. the last thing I did with rocket yesterday was I opened christian’s reflection test map from this thread (although I doubt it has anything to do with this) https://rocket.unrealengine.com/questions/3662/problem-spherereflectioncapture.html
windows 8 with a radeon card.
–EDIT–
just remembered my Norton 360 runs a live update whenever I connect to the internet, don’t know if that makes any difference (I tend to doubt it)