You can upgrade any version from Group-Office. For some versions it’s necessary to do it in steps:

  • 2.18 can upgrade to 3.7.55
  • 3.7.55 can upgrade to 6.2
  • 6.2 can upgrade to 6.3

Needless to say, but always make a backup before upgrading.

After the upgrade you should consider replacing the “gota” module with the new “assistant” module for better file editing on the desktop.