[Freesurfer] License for FreeSurfer 5.x

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Hello everyone,

I am working with a neuroimage model that uses the FreeSurfer 5.3 version as preprocessing (only autorecon-I). I have tried to install Freesurfer 5.3, but after reading previous messages in the mailing list It seems the license file format changed from FreeSurfer 5.3 to 6.0 due to an update of the Ubuntu libcrypt. Do you think that migrating the autorecon-I from v5.3 to v6.0 might affect the final results? Is there any alternative? Does a docker container running Ubuntu 12 with FreeSurfer 5.3 could work? Is still possible to get a license with the old format?

Regards! Rafa Navarro