In the OxE to remove a MCDU that is stuck you can try the hidden option is the listrad command, mind you if you break it you buy it.
(1)oxea> listrad
0 : Exit
1 : Display all the translator
2 : Display some MCDUs (Synthax :<MCDU0>:<MCDU1>,<MCDU2>,<MCDU3>)
3 : Used tables
4 : Display the MCDUs with flag
Choice : 5
0 : Exit
1 : Display
2 : Creation
3 : Deletion
4 : Search Free Number