I am not sure but try this.
On the desktop version there is an option under server in the menu bar; then click on Tableau Public and later click Open from web option
I am sure you don't have to redo everything.
Let me know if it worked
Very appreciate! I'm sure I don't need to rebuild the workbook from beginning!
I opened the workbook in desktop edition 8.0.4 successfully. Although I have not tested all of the functions yet, but the major ones work correctly.