Looks like the new version hit GOG.com. Just downloaded.
Or I wonder if there is actually a need for a separate Steam vs non-steam tool kit. If so it would be great if Larian could just provide a link to where it could be downloaded.
Well certainly it makes sense for steam to have one in the library. But It should be possible for Larian to make that publicly available instead of just to DOS owners. That way you could use it with a DOS copy from any platform.
In the interim while the toolset was broken on GOG.com I used the Steam toolset with my GOG copy of the game. Worked perfectly fine. Of course this was only an option since I have copies on both platforms.
This issue will work itself out as patches slow down.