From magic-league:
1: Download the text patch, saving it to an easy to find location.
2. Open Workstation
3. Select any card in the left(masterbase) column
4. Go to Tools->Analyze/Add/
Remove Sets...
5. Click Add New Edition
6. Enter an Edition Name and Key(i.e. Dark Ascension; DKA)
7. Check the box which says Get data a from text Spoiler
8. Enter or
Browse for the text you downloaded earlier.
9. Hit Next Page
10. Wait for the set to update, this should be very quick. It should say "
X cards added, 0 missed" when through. Hit OK.
11. Select a card in your masterbase, then open the Complex Card Filter
12. Press Default, then press Set as MAIN Filter and Agree to the confirmation box.
13. Select a card in your masterbase and go to File->Save Deck/Library
14. Close Workstation
15. Re-open Workstation and your new cards will be ready to use.