StarDict (a program/file format) is easily googlable. A bit of a rabbit hole is that it's been chased around hosting providers because its site (used to) offer downloads of copyrighted dictionaries, including the OED 2nd edition. I don't know how these files were originally obtained or produced. See: https://web.archive.org/web/20230718140437/http://download.h...

Edit to add: Also, "i scanned the first edition decades ago" sounds like quite a story. 13 volumes? What project were you doing?