I read about this PlugIn after I'd updated into WordPress 3.8.
So it's not unusually that the programmers didnt fix the last valid version, but after an installation my debug.log grown up very fast and in case of shown Errors there comes up a couple of Lines which are not longer supported.
Damned - i lost a nice Tool ;-)
… and that before i'd used it in the first time ;-)
It doesn't look so heavy and i hope that the developers will fix it as soon as possible?! I will have an Eye on this - good luck ;-)