I started an upgrade from 6.1 (pro) to 6.5 (open-source), upgrade from 6.1 to 6.2 went fine, but have a problem with upgrading to 6.3: ErrorException in Unknown at line 0:
The encoded file /usr/share/groupoffice/modules/savemailas/model/LinkedEmail.php requires a license file groupoffice-pro-6.3-license.txt.
According to github https://github.com/Intermesh/groupoffice/issues/197
this is a bug and a license is needed. I'm wondering if it is possible without a license?