Half a year for what? I assumed your question before was about avoiding future problems, rather than fixing an existing one.
There was a bug with an earlier version of the GOG editor, which was eventually fixed. With the most recent update of the game, there was a delay releasing the editor on GOG (at least part of which was Larian's fault), but it was updated.

In general, AFAIK the only thing preventing the release of a separate version of the editor is just the extra time and effort it would take, with an extra round of QA for updates, etc.