Upgrade Python 2.6.4 to 2.6.5

[Werner F. Bruhin]

Just upgraded on my Windows 7 machine my copy of 2.6.4 to 2.6.5.

However doing sys.version still shows 2.6.4 even so python.exe is dated 
19. March 2010 with a size of 26.624 bytes.

Is this a known issue?  Or did I do something wrong?

If I install to a new folder all is well, but I would have to install 
all my other stuff again (kinterbasdb, matplotlib, sphinx etc etc).

Werner