I would like clear instructions for restoring all of my local files (removing and replacing the *.cloud files with original files). Then I would like clear instructions for removing the software without any disruptions to my local files.
You can right-click->sync on the folder, then slide the slider all the way to the right for “Everything” and check the “Include subfolders” checkbox, then click on the big sync button. This will initiate a recursive sync on the folder. It is possible for the sync to stop if it hits enough errors from the cloud storage (like rate limits or general server errors), so you may need to run those steps a few times until everything is down, depending on how much data you have.
You can uninstall odrive using the instructions here: How do I uninstall odrive?. The uninstall will rename the odrive folder to an odrive_backup name, but keep the items in there as they are.