File disappears from list after being dragged out

[ohrenkino]

Then have a look at this thread:

Drag and drop file out of Mp3tag into ...

Drag&Drop is an interaction between 2 programs. After a D&D action the receiving program gives a feedback of what the action should be interpreted. The possible feedback ist the following: 0 DROPEFFECT_NONE Drop target cannot accept data. 1 DROPEFFECT_COPY dropping invokes copying. 2 DROPEFFECT_MOVE dropping invokes a move 4 DROPEFFECT_LINK dropping creates a link The source application then acts accordingly. So apparently some of your applications report "move" and others "co…

It is not MP3tag that determines what happens to the files but the accepting application.
So please turn to the Audacity developers and tell them that this is not the way you like it.
The option that you quote is an option to set whether you still want to see files in MP3tag that have been moved by MP3tag to a different folder than the current working directory.