Open any file (DGN or DWG) then place the D-TBLK.dwg as a cell in that file (Element>Cells>File>Attach File). Once the D-TBLK is placed in the file as a cell, go to "edit tags" and select the cell. It should bring up the list you need to edit. The value column is what you want to change, NOT the name column.
Open any file (DGN or DWG) then place the D-TBLK.dwg as a cell in that file (Element>Cells>File>Attach File). Once the D-TBLK is placed in the file as a cell, go to "edit tags" and select the cell. It should bring up the list you need to edit. The value column is what you want to change, NOT the name column.