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Documentation, guides, and resources for Noldus products.

Upgrade to ErasmusLadder 2.0

Last updated: Aug 24, 2026

To upgrade from version 1.x

IMPORTANT Installing ErasmusLadder 2.0 overwrites version 1.x. If you run experiments in the old version, complete the experiments in the same version. Use ErasmusLadder 2.0 for the new experiments.

1. Follow the procedure as described in the installation instructions.

2. When you start ErasmusLadder for the first time, a window appears asking to enter the Upgrade key. Enter the code that you received from Noldus.

NOTE Experiments saved in ErasmusLadder 2 cannot be opened in ErasmusLadder 1.x.

Find more information on how to upgrade your license in this knowlegde base article: https://noldus.com/app/home/shared/knowledge-base/answer/282

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