Announce fast approaching end of free trials for pre-April installations.

Currently 1964 machines are at risk of shutdown by Monday without a
license purchase.

Author: kleinerm

_posts/2025-04-11-FreeTrialShutdown.markdown

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+---
+layout: post
+title: End of first batch of free trials for Psychtoolbox imminent
+categories: news
+author: kleinerm
+---
+
+This is a reminder that the first large batch of free time limited trials for free use
+of Psychtoolbox 3.0.20 and later for Apple macOS and Microsoft Windows will end very
+soon for all those machines on which version 3.0.20 was first used before start of
+April 2025.
+
+**Free trials for those machines will end on coming Monday the 14th of April 2025**,
+and further use of the software will require a paid software subscription license key,
+which you can buy from our store, accessible from [www.psychtoolbox.net](https://psychtoolbox.net/).
+
+Free trials **started for initial installations since April** will always end 14 days
+after initial use of Psychtoolbox version 3.0.20 or later on a given machine.
+
+**We strongly recommend upgrading any 3.0.20 Psychtoolbox to at least version 3.0.21.0**,
+but in general to the very latest published version.
+
+**Buy now and receive a license at a low early-bird rate!**
+
+[For questions and discussions, follow this link to the discussion thread on our user forum.](
+https://psychtoolbox.discourse.group/t/subscription-model-q-a/5678)
+
+[For answers to frequently asked questions, follow this link to the slowly building FAQ on our Wiki.](
+https://github.com/Psychtoolbox-3/Psychtoolbox-3/wiki/FAQ#faqs-for-software-license-keys)