The option to use the latest IE engine version should be called "Use Internet Explorer 7 Engine" and should be disabled by default. See more in description.

By default, on startup Drew's Web Browser will check to see if the FEATURE_BROWSER_EMULATION Registry key exists for its EXE file and create it and set it to 0 if it does not exist if My.Settings.engineUseIE7 is False. If My.Settings.engineUseIE7 is set to True, then it'll be set to 7000 if it does exist and if not, it'll also be created. However, if it already exists, then we'll check to make sure it's already set to what the user chose with My.Settings.engineUseIE7 and if it does exist and is set to what the user wants, then we'll leave it alone.