You may probably realized that the Sequencer doesn't utilize special block that would allow Export to Dewesoft. The underlying article explains a nice workaround of how to use the Export to DXD or Export to DXZ within Sequencer. The sample sequence is attached to the article.
LoadFile block loads datafile 
The first SetMainToolbar block navigates to the Export tab and to the Dewesoft export.
The second SetMainToolbar block once again navigates to the Export tab but in this block, it presses the Export button. The limitation is that you couldn't change the export name within the sequencer.
In case you would like to utilize the Export to DXZ you should perform the DXZ export once, that export settings save to the Project file.