Change timestamp check (prevent false positive)

requirements.txt

@@ -1,5 +1,4 @@
 aiohttp==3.8.1
 appdirs~=1.4.4
 aiopath~=0.6.10
-setuptools==60.9.3
 xdelta3~=0.0.5

worthless/patcher.py

@@ -1,3 +1,6 @@
+import os
+import platform
+
 import xdelta3
 import tarfile
 import appdirs
@@ -164,11 +167,29 @@ class Patcher:
         if crash_fix:
             self.apply_xlua_patch(fallback=fallback)
 
+    @staticmethod
+    def _creation_date(file_path: Path):
+        """
+        Try to get the date that a file was created, falling back to when it was
+        last modified if that isn't possible.
+        See http://stackoverflow.com/a/39501288/1709587 for explanation.
+        """
+        if platform.system() == 'Windows':
+            return os.path.getctime(file_path)
+        else:
+            stat = file_path.stat()
+            try:
+                return stat.st_birthtime
+            except AttributeError:
+                # We're probably on Linux. No easy way to get creation dates here,
+                # so we'll settle for when its content was last modified.
+                return stat.st_mtime
+
     def _revert_file(self, original_file: str, base_file: Path, ignore_error=False):
         original_path = self._gamedir.joinpath(original_file + ".bak").resolve()
         target_file = self._gamedir.joinpath(original_file).resolve()
         if original_path.exists():
-            if abs(base_file.stat().st_mtime_ns - original_path.stat().st_mtime_ns) > 3600:
+            if abs(self._creation_date(base_file) - self._creation_date(original_path)) > 3600:
                 if not ignore_error:
                     raise RuntimeError("{} is not for this game version.".format(original_path.name))
                 original_path.unlink(missing_ok=True)