diff --git a/common.py b/common.py
index ae19a58a..3fb1095d 100644
--- a/common.py
+++ b/common.py
@@ -95,7 +95,7 @@ class Globals:
 	GITHUB_MASTER_BASE_URL = "https://raw.githubusercontent.com/07th-mod/python-patcher/master/"
 	# The installer info version this installer is compatibile with
 	# Increment it when you make breaking changes to the json files
-	JSON_VERSION = 11
+	JSON_VERSION = 12
 
 	# Define constants used throughout the script. Use function calls to enforce variables as const
 	IS_WINDOWS = platform.system() == "Windows"
diff --git a/installConfiguration.py b/installConfiguration.py
index 85cd7515..605879d0 100644
--- a/installConfiguration.py
+++ b/installConfiguration.py
@@ -2,6 +2,7 @@
 
 import os
 import hashlib
+import zlib
 import common
 from datetime import datetime
 
@@ -19,6 +20,13 @@ def getSHA256(path):
 		m.update(file.read())
 		return m.hexdigest()
 
+def getCRC32(path):
+	"""Gets the SHA256 Hex digest of a file at path as a string,
+	e.g. '51100D6D'
+	The file must fit in memory"""
+	with open(path, "rb") as file:
+		return hex(zlib.crc32(file.read()) & 0xffffffff)
+
 def getUnityVersion(datadir, verbosePrinting=True):
 	# type: (str, bool) -> str
 	"""
@@ -49,7 +57,7 @@ def checkChecksumListMatches(installPath, checksumList):
 			print("checkChecksumListMatches(): File at {} does not exist, skipping this file".format(path))
 			continue
 
-		actualChecksum = getSHA256(path)
+		actualChecksum = getCRC32(path)
 
 		if actualChecksum.lower() == checksum.lower():
 			print("checkChecksumListMatches(): File at {} has matching checksum {}".format(path, actualChecksum))
diff --git a/installData.json b/installData.json
index d1d4278f..413173d9 100644
--- a/installData.json
+++ b/installData.json
@@ -1,5 +1,5 @@
 {
-	"version": 10,
+	"version": 12,
 	"mods": [
 		{
 			"family": "higurashi",
@@ -486,20 +486,20 @@
 						{"name": "ui",    "id": "ui-windows", "os": ["windows"],      "unity": "2017.2.5", "url":"https://07th-mod.com/ui.php?chapter=matsuribayashi&os=win&unity=2017.2.5"},
 						{"name": "ui",    "id": "ui-macos", "os": ["mac"], "unity": "2017.2.5", "url":"https://07th-mod.com/ui.php?chapter=matsuribayashi&os=unix&unity=2017.2.5"},
 						{"name": "ui",    "id": "ui-linux-steam", "os": ["linux"], "unity": "2017.2.5", "url":"https://07th-mod.com/ui.php?chapter=matsuribayashi&os=unix&unity=2017.2.5", "targetChecksums": [
-							["sharedassets0.assets.backup", "24e34f48f675d8577fdf1e01baa9a40a1c1505d39283def309f4245536c73220"],
-							["sharedassets0.assets", "24e34f48f675d8577fdf1e01baa9a40a1c1505d39283def309f4245536c73220"]
+							["sharedassets0.assets.backup", "4C846650"],
+							["sharedassets0.assets", "4C846650"]
 						]},
 						{"name": "ui",    "id": "ui-linux-gog-mg", "os": ["linux"], "unity": "2017.2.5", "url":"https://07th-mod.com/rikachama/ui/Matsuribayashi-UI_2017.2.5_unix_gog_mg.7z", "targetChecksums": [
-							["sharedassets0.assets.backup", "A200EC2A85349BC03B59C8E2F106B99ED0CBAAA25FC50928BB8BA2E2AA90FCE9"],
-							["sharedassets0.assets", "A200EC2A85349BC03B59C8E2F106B99ED0CBAAA25FC50928BB8BA2E2AA90FCE9"]
+							["sharedassets0.assets.backup", "51100D6D"],
+							["sharedassets0.assets", "51100D6D"]
 						]},
 						{"name": "ui",    "id": "ui-windows-old", "os": ["windows"],      "unity": "5.6.7f1", "url":"https://07th-mod.com/ui.php?chapter=matsuribayashi&os=win&unity=2017.2.5"},
 						{"name": "ui",    "id": "ui-windows-gog-upgraded", "os": ["windows"], "unity": "2017.2.5", "url":"https://07th-mod.com/ui.php?chapter=matsuribayashi&os=win&unity=2017.2.5", "targetChecksums": [
-							["sharedassets0.assets.backup", "22890F97997B7B7BD21F5E64F69E1A6FB2E0FF82B3DF6C59860D8D1A56B23BBB"]
+							["sharedassets0.assets.backup", "BE4892CF"]
 						]},
 						{"name": "ui",    "id": "ui-linux-old", "os": ["linux"], "unity": "5.6.7f1", "url":"https://07th-mod.com/ui.php?chapter=matsuribayashi&os=unix&unity=2017.2.5"},
 						{"name": "ui",    "id": "ui-linux-gog-upgraded", "os": ["linux"], "unity": "2017.2.5", "url":"https://07th-mod.com/ui.php?chapter=matsuribayashi&os=unix&unity=2017.2.5", "targetChecksums": [
-							["sharedassets0.assets.backup", "a1f7b39665d63d704bc14275dcdf71cf4cca9532ac61bee23b5b18b62a5cd3af"]
+							["sharedassets0.assets.backup", "1A9CD5FC"]
 						]},
 						{"name": "system", "id": "system-gog-linux", "os": ["linux"], "unity": "5.6.7f1", "url": "https://07th-mod.com/rikachama/matsuri-system/Matsuribayashi-System_unix.7z"},
 						{"name": "system", "id": "system-gog-windows", "os": ["windows"], "unity": "5.6.7f1", "url": "https://07th-mod.com/rikachama/matsuri-system/Matsuribayashi-System.7z"}