ok so as far as i know download the link i gave you above
the migrate 600/900 files extract and save to your documents
click it open and click the dnl till you get to g_eeu10 and g_mpeu10
delete the g_mpeu10 file just leavening g_eeu10
this should bring you back to a standard nav600
but as you have had missing option lists before and after doing this there is no grantee
this will bring them back
also before you go ahead with this i would like confirmation from @raimon this will work
so wait till his response thanks.
the migrate 600/900 files extract and save to your documents
click it open and click the dnl till you get to g_eeu10 and g_mpeu10
delete the g_mpeu10 file just leavening g_eeu10
this should bring you back to a standard nav600
but as you have had missing option lists before and after doing this there is no grantee
this will bring them back
also before you go ahead with this i would like confirmation from @raimon this will work
so wait till his response thanks.