I now have a Primary & an Other inboxes. How do I put them together without losing emails from either one?
If you are using eM Client for desktop, see the following eM Client support link on how to remove / turn off any categories you don’t want.
You can just “right click on the Category” and you will see an option to disable the Other Category. You can also disable that in eM Client Settings.
If you disable the Other Category, those emails will then “automatically appear back in the Primary tab”. If you don’t want any Categories “you can also hide the Categories bar completely”, either via right click or via eM Client Settings.
If you are using eM Client mobile Droid or iOS app, “press and hold” your finger on the Other category you don’t want and the Category tabs screen will appear to disable the Category. You can also disable all categories if you don’t want any via the app “Menu / Settings / Mail / Categories” section.