If you own the game on a platform like Steam , the update should download automatically. You can verify this by right-clicking the game in your library, selecting Properties > Updates , and ensuring "Always keep this game updated" is selected.
If you are returning to the game for this update, here is what to expect for playtime: ~9 hours Main + Extras: ~19 hours Completionist Run: ~31.5 hours Vambrace: Cold Soul Patch 1.11 available! - Steam News download-vambrace-cold-soul-v1-10-plaza-update-v1-11
If you are on version 1.10 and the update hasn't triggered, use the Steam Library feature to "Verify integrity of game files." This will force the client to check for missing patches and download v1.11. If you own the game on a platform