Moving email Folders to a different order on left Pane


I couldn’t see this when doing a search…
My question is;-
I have 4 email Accounts BUT I want to move them so that the most used account is a the top and the least used account is at the bottom (Similar to what I have in Windows Mail)
I tried moving it with the mouse “Move Folder” But get the error message
“Cannot Move Special Folder”

Also do you do any discount for single user as I may be interested to move over completely at the end of my trial BUT £44.95 is far too expensive!

Best Regards,