I can confirm this crash. The debugger stop at line 377 of HelpConfigDialog.cpp (Help plugin).
"Added default keyword and keyword case support options in help configuration (patch #2114)."
I have commented the line 39 of HelpConfigDialog.cpp to disable the event texDefaultKeyword introduced in this patch. Everything works fine for me now.
Note: I don't know what the OnDefaultKeywordEntry() function has to make (I'm new to wxWidget and CB programming).