Yeah, i'm hoping Mackoy can sort it out, because nobody else can without the source code. If that was available, it will be very easy to fix. I'm hoping the guy still has an interest in doing it, and that he still wants to develop BVE 4, but judging by the date of the last release, it doesn't look good, however, he has just recently updated his website a bit, so there might be some hope.
Having just had another play about, with no success (suprisingly) i'm almost convinced that the problem lies in the Interop.DxVBLib.dll file.