Has anyone used OE Classic? in Software Posted November 28 · Report reply - OEC version v3.0 available:https://www.oeclassic.com/ - Details on the major changes/improvements:https://www.oeclassic.com/news (I know that "Under the bonnet" there were (much) more (smaller) changes / bug fixes). - My personal recommendation is to make a backup of all the user data before upgrading to v3.0. The new version uses a new database structure that is not compatible with previous versions and something could go wrong during installation. - The installation program of v3.0 will automatically upgrade the database structure during installation.