Hi Jon,
Welcome! Glad you found the site.
Yes, I can restore you DiscussionApp from the archive that you have as long as it is valid.
If you haven't already, please create a new account & DiscussionApp that can be used as a destination for your archive restore. You can do so using this form:
https://nediscapp.com/account/wizard
Once your account is created and activated, there will be a section in your DiscussionApp's admin page to 'Import/Export'. In here and under the 'Import Disc App' section, you can upload your archive.
If you have issues uploading the data that way, you can also send it directly to nediscapp@gmail.com if you're comfortable doing that.
Once a copy of the archive is uploaded, I should be able to get the forum restored in a few days as long as there's no issues.
Please let me know if you have any issues creating an account or sending the archive to restore.
Thanks in advance!
Erik