Nihlumis: I don't know remember which engine was current when I bought it, it was almost 5 years ago...
Though you seem to have trouble believing that I bought the DLC version since you're referring to it as "the second game".
Dragonfall was originally released as DLC for
Shadowrun Returns in February of 2014, it was released as a standalone version later the same year but it wasn't like those of us who bought the DLC version got access to the standalone version automatically. Please see the attachment for what it looks like when I try to download it.
I wasn't impugning your credibility, merely curious. :)
It seems you have been abandoned by the Harebrained Schemers (!).
For sure, there is no way that the current version of the game (supplied with its engine 2) would ever work on the first engine; the matrix, for example, has a quantified alert (
i.e., the red alert has a discrete number, out of a total alert level, unlike the similar but distinctly lacking alerts of the first engine, whereby no numbers are displayed).
I suppose you would be stuck at the pre-Director's version (where they added the alternate ending, etc.), yes?
Whatever the cause, I wonder if there are many others in your predicament? I am not a big fan of evil playthroughs (tend to be chaotic-stupid or straw-evil, kick-the-dog type interactions, which I don't find very entertaining), so I haven't even seen the alternate ending, but there are ongoing updates (still?) to the overall presentation of the game, too, that you must have missed out on.
What is the attitude of Gog support? I would have thought the easiest fix would be to grant you the second game. But, there seems to have been a lot of complexity around this IP, since there have been numerous versions (developer-distributor legal demarcation disputes and similar, it seems). Perhaps they have a discounted upgrade path for you, since yours is a peculiar predicament, for sure.