Step 1:

Using the freshOps Search Menu, search for the Site you need to restore and select the archived site.

Step 2:

In the Archived Site Page hit the RESTORE Button

If you are looking to restore a site where the Client has also been Archived, restoring the site, will also restore the Client.

If you are looking to restore a Client, restore any of that client's sites, and it'll automatically restore the Client.

If you don't need the Site, then you can archive it, and the Client will remain active.