I'm a few versions back - v16.03.55 x64. When I try to view the help by hitting F1, TCC crashes. Tell me where to find a dump file and I'll upload it. But if I run TCMD instead, F1 loads the help just fine. I've been using v16 for a long time and this never happened, and now it happens 100% of the time. The only recent change I can think of to my system is that we had our Internet Explorer upgraded from either v9 or v10 up to v11. That may or may not be relevant, but I figured I would at least report it.