For the 3DXchange 6 problems, please try downloading and install the file below.This will repair your Visual C++ installation and may resolve the problem.
When prompted you will need the vcredist_x86.exe version for 3DXchange 6.
http://www.microsoft.com/en-gb/download/details.aspx?id=40784
If you continue to have problems, please contact Technical Support using the link below. They will be able to advise you further.
http://www.reallusion.com/CustomerSupport/UserEx/QForm.aspx