Joomla! 3Install / Update
Create a backup of the current DigiFolio projects through the backup option in the backend. Copy (via FTP or eXTplorer) the file digifolio.css in the folder componentscom_digifolioassets to a backup folder.
Install version 3x the same way you install any other component and the installation/update will be started. Restore the digiflio.css from your backup location to the folder componentscom_digifolioassets to restore your previous layout. With version 3.x this can be done with the recover function.
It could be neccesary to recreate menu-items which refer to the DigiFolio component. This is needed avoid old settings and use the newest for sure.