XSTOOLs Version 5.1.3 (executables): Setup file for the utilities that download and exercise the XuLA, XSUSB, XSA, XSB, XSV, XS40 and XS95 Boards. For 32-bit and 64-bit versions of Windows 7, Vista, WinXP and Win2K. NOTE The winusb.dll file was missing in the previous version of this installer, so get this updated version and re-install if you're having problems.
