USB installation files.

The USB drivers have changed as of September 2016. Please download the September 2016 (or later) USB dll for all your applications:  HERE
This dll is compatible with older or newer drivers on 32 and 64 bit computers.

If you install automatically on-line, the drivers will take care of themselves. If you need to update your drivers from an earlier installation, or you want to install drivers manually, please follow the instructions at this link
64-bit  WinXP/2k/Vista/7/8   archived files    ( install.zip )   individual files Before downloading the archive  Read this 
64-bit  Win10   ( new )   archived files    ( install.zip )   individual files Before downloading the archive  Read this 
 NOTE 
To download an archive, right-click link with mouse and choose "save target as" from drop-down menu. Use a file decompression utility such as the one that is included with recent versions of Windows  - WinZip® or similar software for older versions of Windows -  to extract the contents. Follow the instructions in the  "ReadMe.pdf"  for file usage instructions.   *Individual files require no decompression software.
For 32 bit Win98 through Win8:  HERE
For a 64 bit dll for 64 bit Excel or Matlab:  HERE