Is it necessary to use version 3.3 or older? I tried downloading it from the sourceforge.net link provided in the spoken tutorial videos. However it fails to download completely and/or fails to execute after completion of download. On the other hand the latest version 3.6 of DWSIM works without issues. So can i go ahead using this latest version? The proposal form strictly requires me to fill in either of versions 3.2,3.3 or older.