Yes - it is available at:
https://multibit.org/releases/multibit-0.5.11/It also has a PGP signature to check.
For the last few releases I have been uploading the multibit-exe.jar and multibit.exe as to upgrade you could 'copy-paste' over the existing executable as you describe. Occasionally in a release there are other changes (typically new files that need installing) so some releases I won't upload them - in these cases a full install will be required.