I seem to forget this everytime an update comes out

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but I played 15.7 with the Mod (and happy to wait for the mod update)
What I don't get, is I DLd 15.8 (the whole thing) put it in a clean folder, (it says 15.8 on startup)
started a new game from scratch (did 3 speedruns Steph, Lydia, Steph&Lydia)
-All 3 stop where the paths previously finished (no new content).
With how I've installed the new update, it should have no connection to the mod & nothing preventing the new content?
Could someone tell me where I've stuffed up or maybe post a save at the start of the new content?