Version 6.0.16 has now solved the problem (see the last bullet point in Item 1 above); but those instructions for manual installation could well be useful in future.We are experiencing a difficulty with the TeX installation. In the meantime, Please follow the alternate TeX installation instructions in this article:
The website calls it the longest equation known to man.
This software is way too good to keep to yourself! Why not tell your friends...We usually send this mailing to our users every couple of months or so. Please let us know if you no longer wish to remain on our mailing list.