Thanks Sebastien, you are exactly right! When the server shuts down unexpectedly it can cause the settings.json file to become corrupted due to it being open for editing when the server powered down. We've implemented logic in more recent builds that should eliminate issues like this, but I am sure there are still some scenarios where we could run into issues. If you or Schalk run into this again please take a quick copy of the user's directory before restoring the settings.json file.
For future reference, we do keep a series of backups of the settings.json and other pertinent JSON files inside of the Archived Data folder, so if you see these behaviors you should be able to swap out a good copy from there. Hope that helps. Have a great day!
Kyle Kerst
System/Network Administrator
SmarterTools Inc.
(877) 357-6278
www.smartertools.com