In Kanbanoo the columns of a board correspond directly M-Files workflow states. The only exception is M-Files assignments which are displayed on a default Assignments board with three or two columns.
While it is not possible to rename columns (to remain consistent with M-Files workflow state) you can rearrange columns, color code column headers and minimize columns to make more space.
Most actions on columns are started via the
column context menu, which you can open by pressing the right mouse button over the column header.