The key bindings were also not present for me after I imported the workflow into Alfred.
A quick diff between the downloaded version and my edited workflow shows no differences though. So this is not the fault of the author but some Alfred security/compatibility measure on import.
You can edit this quickly yourself though:
- Go into Alfred Preferences, select the Workflows tab, then find the Div workflow on the left side
- Double click into each of the boxes titled "Hotkey"
- With selection on the "Hotkey" textbook press for example (control) + (option) +