If you mistakenly change your SGSA.mdb from a coordinator version to a field version, and you want to change it back to a coordinator version so may upload data, then do the following.
Open the SGS application, confirm you are using the SGSA.mdb that you want to change back to a coordinator version.
Simultaneously hit the the Ctrl-Alt-c-h keys to revert back to coordinator version.
Check under the File menu item to make sure the Upload option is now available.
If it is, then you have successfully changed your SGSA.mdb to a coordinator version.