If you updated using the Itcho App like I did, all is not lost! browse to the install location, the ,308 update renames the install folder to GROVE and leaves a folder named with the last version you had with your previous saves. \GROVE0.307\www\saves. In that folder browse to \www\saves. Copy all the files in the saves folder over to the the same location in the GROVE folder, it worked for me!
