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License Information (optional)
In order to gain access to product updates and the support knowledge base, you need to provide your trial number or license number. You can do this by submitting your license.dat file that you find here:
[COMSOL]/license/license.dat
where [COMSOL] is the COMSOL Multiphysics installation directory. This is typically /usr/local/comsolXX on Linux, and C:\COMSOLXX on Windows.