Missing 'Sync' Group?

I might be making a glaring oversite…but I can’t find the special ‘Sync’ Group in the Database pane. I’m using DEVONthink Pro 2.05. I’ve tried removing Library/Preferences, reinstalling, but nothing. The 'Synchronize" file menu remains grayed out, until something is selected…but this seems to have no effect. Are there screenshots of where this should be, or others who have dealt with this issue?

It’s reported/discussed in this multi-page topic:

Where is the Sync Group?

Thanks, sorry for the repost.