>>>Hi everybody,
>>>
>>>Started yesterday the Command Windows shows square boxes instead of the commands. I cleared it last night, but I see again the boxes instead of the commands.
>>>
>>>What should I do to fix the problem?
>>>
>>>Thanks in advance.
>>
>>
>>Font?
>
>No, I don't think it's the problem. I cleared it again and re-opened - so far, so good.

Find the relevant record in your foxuser.dbf, delete it and pack the table. You can actually delete a lot of records which relate to specific windows (one per .prg, class, scx... lots of records).