Yeah, I'd like to know too. This is concerning. TW3 is one of the highlights in the library of a Win7 retro gaming rig. If the update is not compatible with Win7 (cool and totally understand) and replaces original installers (yikes!) it will become very difficult if not impossible for someone to purchase a legit copy, new or used, to run on said rig. Existing owners who aren't paying attention and don't have an old version backed up (probably most of them) will lose it too.
It's so weird for GOG's service of patching/ tweaking old games to have the potential to take DRM-free games out of the libraries of machines they were purchased and running on. Unforeseen consequences from founding ~14 years back I guess, LOL. To avoid this, I would love to see GOG provide an unsupported installer for last version of a game on an OS they previously but no longer support.
Edit:
Looks like the disc version of TW3 goty or complete edition might be an option in the future for Win 7 users if the Nex-Gen Update presents problems. I wonder which installer version is on the disc releases and if it is usable without patching.
Post edited December 05, 2022 by Snickersnack