Since there is no official fix for the disappearing DMFI UI with Mask of the Betrayer, you can go ahead and apply the unofficial fix.  It should be safe, as all you are doing is creating a new file that simply can be deleted in the future if there is an official fix released.  Here are the steps:

1. Copy the "ingameguix1.ini" file from your installation folder (by default, Program Files/Atari/Neverwinter Nights 2/ui/default) into the corresponding spot in your "my documents" folder (My Documents/Neverwinter Nights 2/ui/default).

2. Open the "ingamegui.ini" file that was already in My Documents/ui/default, using notepad or a text editor. There should be a block of several lines in that file that include DMFI references (for example, there is a line with "SCREEN_DMFI_PLAYER=dmfiplayerui.xml").

3. Copy the entire block of lines that include such DMFI references, then open your new copy of ingameguix1.ini (now located in My Documents/Neverwinter Nights 2uidefault) and paste them into it. I put them at the end of the [MandatoryGUI] section.

4. Save and close the file.

{mos_fb_discuss:14}