The recent Magic: the Gathering expansion Kaladesh will held its Prerelease events and so they have showed in the mothership site the full spoiler of the set. As for my usual role in every new expansion, I look for the patch files to update the Magic Workstation software. It was an easy Google search this time and I easily found one text file from the MTG Salvation forums.

You can download it by clicking here.

As for the procedure on patching your MWS, here are the steps:
1. Add the new set via the Add/Remove sets under the Tools tab with expansion initial KLD, edition name Kaladesh.
2. Click the Get data from the text spoiler and then path it to the location of the file downloaded.
3. Press Next and then Add Edition.
4. After that, click the File tab and then Save Deck/Library.