Hello, You do not need to contact us for a (free) academic license. You just go to the website and click the version that you want to download. Here is the standard (noncommercial) download page: <https://www.rbvi.ucsf.edu/chimerax/download.html> Next it should show you the text of the academic license with an "Accept" button at the bottom of the page, and all you have to do is to click it to continue the download: However, if the system is not showing the academic license, and instead it is asking for you to enter a commercial license key, it is because it detects you are downloading from a commercial site. Some people said that their VPN was causing this problem. To avoid the problem, first make sure to turn off your VPN first, or if that isn't the problem, try downloading from a different location (home instead of university, university instead of home, etc.) I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Resource for Biocomputing, Visualization, and Informatics Department of Pharmaceutical Chemistry University of California, San Francisco

On Sep 9, 2024, at 5:20 PM, Angel David Montijo Valdés via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

Good afternoon, I am writing to you in the kindest way to request a free use license for the chimera X program. Because I am a student at the National Autonomous University of Mexico (UNAM), within the Faculty of Sciences, and it would be a great opportunity to use your tool in different molecular biology analyses. If you need a proof of my identity as a student, you can ask me for it without any problem.

I look forward to hearing from you. Best regards.