Manageing an existing BiBTeX
Open an existing BiBTeX follows standard method of openning files i.e. Ctrl+O or File ▸ Open in menubar.
Manageing an existing BiBTeX file using mkBiB can be done in two way.
Editing The View Pane
All the elements visible in the right pane can be edited by double clicking on the corresponding cell.
Only visible columns, i.e. 5 columns can be edited. For all other columns, you have to do it manually, using a Text Editor.