Okay you are right, it does appear that 4.63 at least runs on W2k... here is my results of just doing a simple kix32 /?

4.53, works
4.60, works
4.61, works
4.62, broke - is not a valid Win32 application
4.63, works

Keep in mind, I didn't run a script, but it is at least positive to see it running again.