"setup_spear_of_destiny_1.4.exe" the one that has now gone missing from the store, and people's libraries?
If you still have ANY seperate installer of Spear of Destiny archived you are "safe". In your library you will only find the Wolfenstein entry with SoD installer merged which does not have the mission pack anymore.
I don't want to be 'that guy' who says "yes, but..."
, but the truth is DRM-Free gives you the opportunity
to prevent publishers from altering / removing access from your content (by backing offline installers up). It's never given any buyer permanent control over the cloud server of the store they bought it from. This is true on Humble (who scrapped several DRM-Free direct downloads in favour of Steam keys), it's true on Steam & Epic (who have both added DRM to some initially released as DRM-Free games in a patch) and it's been true here on GOG even before Wolfenstein 3D. (Eg, GOG used to sell Operation Flashpoint Cold War Crisis GOTY (with 2x DLC's, Red Hammer & Resistance) then that got removed and replaced with ARMA Cold War Assault (only 1x DLC Resistance with the Red Hammer campaign completely stripped out and missing). This is why some of us 'kick up a fuss' over the "2nd class citizen" thing regardless of how it upsets some to 'keep hearing about it'. Achievements, cloud saves, Galaxy rollback, even Galaxy itself can disappear server-side *poof* just like that. Offline installers are the only thing here immune to unwanted alteration by GOG or the publisher that actually gives tangible meaning to "DRM-Free" or "game preservation" in the long-run.
I know that you are right. I guess I was just a bit too naive and idealistic seeing GOG as a platform from gamers for gamers that really understands their customers and will protect their libraries as well to make sure that they stay satisfied. Guess I was wrong here and in the end GOG is just a shop like every other ... my mistake. Won't make it again and won't continue to see GOG as anything else than a store and everything else they say is - as proven multiple times - simply PR talk. Sometimes it is nice to dream but sometimes you really need to wake up.
This is a hard learned lesson but at the least it is positive in outcome in that it alerts gog customers to a few naked truths about gog.
The precedent for me was the total removal from my account/library of the TES games Arena and Daggerfall.
The only reason I discovered this was by community scrutiny. Just to be clear on this: gog removed these games from peoples libraries across the board and without prior warning or consent. This is very similar to what is happening here.
Those particular games could be re-acquired by the user at a different version but that is not the point. Library entries were deleted by gog.
Curiously enough, when I re-acquired Daggerfall and noticed that the version was different to my back up, I asked gog to remove the game from my account. The reply I recieved was that it was not possible to remove a game from my account.
It's OK for gog to do it though, without warning.
Recently, we have seen what has happened to the witcher3, I realise this is not directly connected but it helps to demonstrate an important point that all gog customers need to be aware of:
The day you purchase a game from gog, you are covered by a 30 day refund "guarantee". This guarantee is at gogs discretion.
After that point, you no longer have a leg to stand on. In other words, you can trust gog for 30 days after purchase, assuming they feel like it.
Back up your games at point of purchase independently from gog, preferably on the date of purchase.