I have exactly the same problem here: 440 + 372 errors!
I unistalled MyPE, deleted its folder in %appdata%, installed as portable... but the problem isn't gone.
Last thing to do is restart the system
but actually I can't...
I uninstalled toshiba bluetooth drivers and now I'm using Windows Generic bluetooth drivers. Now everything works except that I must check "Avoid stand-by mode" in settings... frankly I don't really understand why connection should drop when screen goes off... maybe it's related to some android ...
thank you for your answer. initially the bluetooth adapter worked without toshiba drivers, instead it worked with "generic" driver (I suppose it's the name of windows driver). The problem is that with "generic driver" I could not obtain a com port to pass to MPE software... maybe the windows driver ...