and the moral of the story is avoid putting these files in place like dropbox.

I don't know if google drive is any better but here is the link for files needed to get interlaceing back:

GK2 interlace

Good thing I still had my game patched. I've tested it with current instalation.

First you need to copy files to PATCHES folder in game directory and overwrite them.

Now if you want to use ScummVM we need to add the game again: run the game, then press ctrl+F5 and choose Return to laucher and then delete game. Now add game, you should by in game folder so press Choose. Game will be added, now go to Engine tab and check Enalbe black-lined video. Press Ok and then Start. Game should now work with scan lines.

If you prefer to use DOSBox mount game directory as C: and run file GK2DOS.BAT. Game should run just fine.

Didn't test it beyond first location.