See attached. I have turned on “Show Inboxes” under General settings. This places a folder at the top of the left pane that shows all my email account inboxes. This is great because I can select individual email account inboxes or all of them together. I prefer this to the Favorites/show all inboxes. I would like eMclient to start in the "Inboxes’ folder. Can this be done?
I just got brought over from the Postbox buyout and this was the first thing that bothered me about emClient. I wish the right sidebar tree was just remember the way I left it, including expanded folders in my main gmail account. Postbox did this 
Selecting “All Inboxes” on startup was a consolation for me. I do wish like this poster that “Inboxes” would just remember the last thing highlighted.