You should be able to just upgrade over the old one. Probably Warpin
will complain that some of the DLLs are locked, let it unlock them and
upgrade them and then _reboot_. Same with any other Warpin archives you
update such as libc, reboot if a DLL is in use to make sure the new one
is being used.
Of course also make sure the Warpin installed DLLs are close to the
beginning of the LIBPATH and watch for duplicates that might get loaded.
Dave