If you're familiar with REW you can do the correction with that and upload the file into Roon.I am familiar with REW and tried it with the MiniDSP before upgrading to Dirac. With subwoofer integration, it just felt like too much of a struggle. Dirac was so much easier.
Unfortunately Roon doesn’t seem to work with the new desktop version of Dirac - which would have been ideal, as I could then use “any” endpoint or Dac.