Regarding the presets, you can 'trash the preferences' and then restart Cubase. To do this, Open the Library folder on your hard driver and then the Preferences folder. Delete the Cubase folder in the Preferences folder. Once this folder is deleted, Cubase will recreate this preferences folder when it you open it again and the presets should appear.

Regarding your recording issue with Miroslav, Make sure that you have the MIDI input on the MIDI track assigned to the keyboard that you have connected to your computer and Miroslav selected as the MIDI out. Also be sure that the record enable button is selected on the MIDI track.

Hope this helps.