While SAi (the makers of Flexi) is now on version 22 or 23 (Cloud), version 10 remains legendary for three reasons:
(Invoking related search suggestions now.) flexi 10.0.1 download
If you lost your original disc but have a valid dongle, SAi is legally obligated to provide you a replacement installer (for a small media fee). Always keep your proof of purchase. While SAi (the makers of Flexi) is now