Try to get %APPDATA% from registry like ActiveState's appdirs does

Author: g1itch

src/paths.py

@@ -53,6 +53,22 @@ def get_short_path_name(long_name):
             output_buf_size = needed
 
 
+# https://github.com/ActiveState/appdirs/blob/master/appdirs.py
+def _get_win_appdata_from_registry():
+    """This is a fallback technique at best. I'm not sure if using the
+    registry for this guarantees us the correct answer for all CSIDL_*
+    names.
+    """
+    import _winreg
+
+    key = _winreg.OpenKey(
+        _winreg.HKEY_CURRENT_USER,
+        r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
+    )
+    dir, type = _winreg.QueryValueEx(key, "AppData")
+    return dir
+
+
 def lookupExeFolder():
     """Returns executable folder path"""
     if frozen:
@@ -88,8 +104,8 @@ def lookupAppdataFolder():
                 'Could not find home folder, please report this message'
                 ' and your OS X version to the BitMessage Github.')
     elif sys.platform.startswith('win'):
-        dataFolder = get_short_path_name(
-            os.path.join(os.environ['APPDATA'], APPNAME) + os.path.sep)
+        dataFolder = os.path.join(
+            _get_win_appdata_from_registry(), APPNAME) + os.path.sep
     else:
         try:
             dataFolder = os.path.join(os.environ['XDG_CONFIG_HOME'], APPNAME)