diff --git a/cachedDownloadSizes.json b/cachedDownloadSizes.json
index 8b6ef299..762ac089 100644
--- a/cachedDownloadSizes.json
+++ b/cachedDownloadSizes.json
@@ -5,7 +5,9 @@
     "https://07th-mod.com/Beato-voice/Umineko1to4.exe": 8903849,
     "https://07th-mod.com/Beato/1080p/Umineko-Graphics-1080p-v3.7z.meta4": 2711465782,
     "https://07th-mod.com/Beato/1080p/Umineko-Update-1080p-Rolling-ALL-OS.7z": 34425895,
+    "https://07th-mod.com/Beato/1080p/Umineko-Update-1080p-v3_2019_01_03_MAC_LINUX.7z": 237786109,
     "https://07th-mod.com/Beato/1080p/Umineko-Update-1080p-v3_2019_01_03_MAC_LINUX.7z.meta4": 237786109,
+    "https://07th-mod.com/Beato/1080p/Umineko-Update-1080p-v3_2019_01_03_WINDOWS.7z": 300219979,
     "https://07th-mod.com/Beato/1080p/Umineko-Update-1080p-v3_2019_01_03_WINDOWS.7z.meta4": 300219979,
     "https://07th-mod.com/Beato/1080p/Umineko1to4": 1481788,
     "https://07th-mod.com/Beato/1080p/Umineko1to4.app.zip": 3074943,
diff --git a/installData.json b/installData.json
index fb9602ad..bf14678e 100644
--- a/installData.json
+++ b/installData.json
@@ -841,6 +841,21 @@
 						}
 					]
 				},
+				{
+					"name": "Proton / Wine Small Movie Fixes", "type": "downloadAndExtract",
+					"submods": ["full"],
+					"radio": [
+						{"name": "No Change (default)", "description": "Don't apply any Proton/Wine fixes"},
+						{
+							"name": "Small Movie Fix", "description": "Enable this option if you are playing the game on Linux/Steam Deck with Wine/Proton.\n\nFor the Question Arcs under Linux with Wine/Proton, the installer will install the wrong (small) movie files, causing movie playback to only display on the top left of the screen. This override installs the correct 'big' movie files.",
+							"data": {"url": "https://07th-mod.com/Beato/1080p/Umineko-Update-1080p-v3_2019_01_03_WINDOWS.7z.meta4", "relativeExtractionPath": ".", "priority": 10}
+						},
+						{
+							"name": "Revert Movie Fix", "description": "This reverts the above 'Proton Wine Movie Fix' by installing the (small) Native Linux movie files",
+							"data": {"url": "https://07th-mod.com/Beato/1080p/Umineko-Update-1080p-v3_2019_01_03_MAC_LINUX.7z.meta4", "relativeExtractionPath": ".", "priority": 10}
+						}
+					]
+				},
 				{
 					"name" : "Experimental Script", "type": "downloadAndExtract",
 					"submods" : ["full"],