The plug-in works only one-way when exporting REVIT to ETABS and therefore cannot re-import the changes in your ETABS model back into REVIT.
You have the option of exporting All Elements or Selected Elements or Selected Worksets.
You will be able to edit the e2k file in a text file editor.
This tool works with Revit Structure 2012 and Revit 2013.
You have the option of rotating (about the Z Axis) your analytical model in REVIT when exporting to ETABS (without changing your REVIT model geometry).
Use the default families from Autodesk to ensure the tool works properly. If the tool cannot understand the family, the analytical lines will export as null elements in ETABS.
Curved Slabs Edges will be approximated into Straight Lines.
The following elements will be exported to ETABS (.e2k): Columns Braces Beams Walls Slabs Slab Openings Grids Levels Rigid Links