Hi Stefan, the default shortcuts for MoI are pretty minimal and do not include e for extrude or space bar for maximizing a view. If you had that behavior previously it means you set up some custom shortcuts.

If you removed your moi.ini file then that means you'll get a new moi.ini file with the default shortcuts which are:

Cmd+A - Select all
Cmd+C - Copy to clipboard
Cmd+Shift+C - Copy to clipboard with origin
Cmd+N - New file
Cmd+O - Open file
Cmd+S - Save file
Cmd+V - Paste from clipboard
Cmd+Shift+V - PastePart - Paste from clipboard with orient
Cmd+X - Cut
Cmd+Z - Undo
Cmd+Shift+Z - Redo
Backspace - Delete

If you had other shortcuts set up on a different machine then copy the moi.ini file from that other machine to your new one so you can get the keyboard shortcuts that you added like E for extrude.

There are some lists of some people's favorite shortcuts here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=8123.1

- Michael