Download page for Prolog Version 4

It is the release version. However when downloaded it runs in demonstration mode. In this mode the following restrictions apply

If you need to trial a version without any restrictions - download the version as is. If you then send us an email with the site code; we can enable the software via email for a time limited trial run.

If you purchase the software we send you a hardware lock that plugs into a USB port on your computer.

Thank You for downloading Prolog version 4.

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If you have any problems or further suggestions please do not hesitate to contact us.