Here is the dxf converted. I also created cut outs to show you that this is the way. You are making the letters into carve regions and then outlining them. (The reason the inside of the Q does not work was explained by MT in another thread as the outline is not closed. Kind of a bug. If you shrink it down before outlining it might be closed.) Anyway, you do not need to do that. Just cut out the letters.