Flexi 19 dropped support for hardware dongles (parallel or USB). You must migrate to a software license — SAI offers a migration tool.
Before attempting to install Flexi 19, ensure your system meets the minimum specifications for stable operation: flexi 19 software full download
Flexi 22 (latest version) adds cloud collaboration, faster raster-to-vector conversion, and native macOS support. However, Flexi 19 remains more stable for older hardware. Flexi 19 dropped support for hardware dongles (parallel